656245 has 4 divisors (see below), whose sum is σ = 787500. Its totient is φ = 524992.

The previous prime is 656237. The next prime is 656263. The reversal of 656245 is 542656.

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

It can be written as a sum of positive squares in 2 ways, for example, as 269361 + 386884 = 519^2 + 622^2 .

It is a cyclic number.

It is not a de Polignac number, because 656245 - 2³ = 656237 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65620 + ... + 65629.

It is an arithmetic number, because the mean of its divisors is an integer number (196875).

2⁶⁵⁶²⁴⁵ is an apocalyptic number.

It is an amenable number.

656245 is a deficient number, since it is larger than the sum of its proper divisors (131255).

656245 is a wasteful number, since it uses less digits than its factorization.

656245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131254.

The product of its digits is 7200, while the sum is 28.

The square root of 656245 is about 810.0895012281. The cubic root of 656245 is about 86.9004454215.

The spelling of 656245 in words is "six hundred fifty-six thousand, two hundred forty-five".