256652257 has 2 divisors, whose sum is σ = 256652258. Its totient is φ = 256652256.

The previous prime is 256652219. The next prime is 256652287. The reversal of 256652257 is 752256652.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 251412736 + 5239521 = 15856^2 + 2289^2 .

It is a cyclic number.

It is not a de Polignac number, because 256652257 - 2²³ = 248263649 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (256652287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128326128 + 128326129.

It is an arithmetic number, because the mean of its divisors is an integer number (128326129).

Almost surely, 2^256652257 is an apocalyptic number.

It is an amenable number.

256652257 is a deficient number, since it is larger than the sum of its proper divisors (1).

256652257 is an equidigital number, since it uses as much as digits as its factorization.

256652257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 252000, while the sum is 40.

The square root of 256652257 is about 16020.3700643899. The cubic root of 256652257 is about 635.4992308592.

The spelling of 256652257 in words is "two hundred fifty-six million, six hundred fifty-two thousand, two hundred fifty-seven".