656901 has 12 divisors (see below), whose sum is σ = 1084512. Its totient is φ = 375336.

The previous prime is 656891. The next prime is 656917. The reversal of 656901 is 109656.

656901 is a `hidden beast` number, since 656 + 9 + 0 + 1 = 666.

656901 is nontrivially palindromic in base 2.

It is not a de Polignac number, because 656901 - 2⁹ = 656389 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is an alternating number because its digits alternate between even and odd.

656901 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656951) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5151 + ... + 5276.

It is an arithmetic number, because the mean of its divisors is an integer number (90376).

2⁶⁵⁶⁹⁰¹ is an apocalyptic number.

It is an amenable number.

656901 is a deficient number, since it is larger than the sum of its proper divisors (427611).

656901 is a wasteful number, since it uses less digits than its factorization.

656901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10440 (or 10437 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 656901 is about 810.4942936258. The cubic root of 656901 is about 86.9293917792.

The spelling of 656901 in words is "six hundred fifty-six thousand, nine hundred one".