Index.is_integer()

Index.nunique(dropna=True)

Index.nbytes return the number of bytes in the underlying data

Index.reindex(target, method=None, level=None, limit=None, tolerance=None)

Index.is_monotonic_decreasing return if the index is monotonic decreasing (only equal or decreasing)

Index.duplicated(*args, **kwargs)

Index.repeat(n, *args, **kwargs)

Index.is_categorical()

Index.is_monotonic_increasing return if the index is monotonic increasing (only equal or increasing)

Index.value_counts(normalize=False, sort=True, ascending=False, bins=None, dropna=True)