87257481 has 24 divisors (see below), whose sum is σ = 130118880. Its totient is φ = 51858432.

The previous prime is 87257477. The next prime is 87257483. The reversal of 87257481 is 18475278.

It is not a de Polignac number, because 87257481 - 2² = 87257477 is a prime.

It is a super-2 number, since 2×87257481² = 15227735980930722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87257483) 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 23 ways as a sum of consecutive naturals, for example, 13825 + ... + 19121.

It is an arithmetic number, because the mean of its divisors is an integer number (5421620).

Almost surely, 2^87257481 is an apocalyptic number.

It is an amenable number.

87257481 is a deficient number, since it is larger than the sum of its proper divisors (42861399).

87257481 is a wasteful number, since it uses less digits than its factorization.

87257481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5353 (or 5336 counting only the distinct ones).

The product of its digits is 125440, while the sum is 42.

The square root of 87257481 is about 9341.1712863002. The cubic root of 87257481 is about 443.5414621279.

The spelling of 87257481 in words is "eighty-seven million, two hundred fifty-seven thousand, four hundred eighty-one".