87256257 has 16 divisors (see below), whose sum is σ = 134384832. Its totient is φ = 49771520.

The previous prime is 87256237. The next prime is 87256261. The reversal of 87256257 is 75265278.

It is a cyclic number.

It is not a de Polignac number, because 87256257 - 2⁶ = 87256193 is a prime.

It is a super-2 number, since 2×87256257² = 15227308771300098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87256207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77208 + ... + 78329.

It is an arithmetic number, because the mean of its divisors is an integer number (8399052).

Almost surely, 2^87256257 is an apocalyptic number.

It is an amenable number.

87256257 is a deficient number, since it is larger than the sum of its proper divisors (47128575).

87256257 is a wasteful number, since it uses less digits than its factorization.

87256257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155568.

The product of its digits is 235200, while the sum is 42.

The square root of 87256257 is about 9341.1057696613. The cubic root of 87256257 is about 443.5393881995.

The spelling of 87256257 in words is "eighty-seven million, two hundred fifty-six thousand, two hundred fifty-seven".