656487 has 24 divisors (see below), whose sum is σ = 1059968. Its totient is φ = 388800.

The previous prime is 656483. The next prime is 656519. The reversal of 656487 is 784656.

It is a happy number.

656487 is a `hidden beast` number, since 6 + 5 + 648 + 7 = 666.

It is not a de Polignac number, because 656487 - 2² = 656483 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 656487.

It is not an unprimeable number, because it can be changed into a prime (656483) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3537 + ... + 3717.

2⁶⁵⁶⁴⁸⁷ is an apocalyptic number.

656487 is a deficient number, since it is larger than the sum of its proper divisors (403481).

656487 is a wasteful number, since it uses less digits than its factorization.

656487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231 (or 228 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 656487 is about 810.2388536722. The cubic root of 656487 is about 86.9111260480.

The spelling of 656487 in words is "six hundred fifty-six thousand, four hundred eighty-seven".