87457 has 4 divisors (see below), whose sum is σ = 92080. Its totient is φ = 82836.

The previous prime is 87443. The next prime is 87473. The reversal of 87457 is 75478.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2283 + ... + 2320.

It is an arithmetic number, because the mean of its divisors is an integer number (23020).

2⁸⁷⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

87457 is a deficient number, since it is larger than the sum of its proper divisors (4623).

87457 is a wasteful number, since it uses less digits than its factorization.

87457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4622.

The product of its digits is 7840, while the sum is 31.

The square root of 87457 is about 295.7312969572. The cubic root of 87457 is about 44.3879265389.

The spelling of 87457 in words is "eighty-seven thousand, four hundred fifty-seven".