87257171 has 4 divisors (see below), whose sum is σ = 88104432. Its totient is φ = 86409912.

The previous prime is 87257167. The next prime is 87257197. The reversal of 87257171 is 17175278.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87257171 - 2² = 87257167 is a prime.

It is a super-2 number, since 2×87257171² = 15227627781846482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87257971) 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 3 ways as a sum of consecutive naturals, for example, 423476 + ... + 423681.

It is an arithmetic number, because the mean of its divisors is an integer number (22026108).

Almost surely, 2^87257171 is an apocalyptic number.

87257171 is a deficient number, since it is larger than the sum of its proper divisors (847261).

87257171 is a wasteful number, since it uses less digits than its factorization.

87257171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847260.

The product of its digits is 27440, while the sum is 38.

The square root of 87257171 is about 9341.1546930773. The cubic root of 87257171 is about 443.5409368701.

The spelling of 87257171 in words is "eighty-seven million, two hundred fifty-seven thousand, one hundred seventy-one".