656287 has 4 divisors (see below), whose sum is σ = 672336. Its totient is φ = 640240.

The previous prime is 656273. The next prime is 656291. The reversal of 656287 is 782656.

656287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-656287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656237) 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, 7963 + ... + 8044.

It is an arithmetic number, because the mean of its divisors is an integer number (168084).

2⁶⁵⁶²⁸⁷ is an apocalyptic number.

656287 is a deficient number, since it is larger than the sum of its proper divisors (16049).

656287 is a wasteful number, since it uses less digits than its factorization.

656287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16048.

The product of its digits is 20160, while the sum is 34.

The square root of 656287 is about 810.1154238749. The cubic root of 656287 is about 86.9022992722.

The spelling of 656287 in words is "six hundred fifty-six thousand, two hundred eighty-seven".