256262257 has 2 divisors, whose sum is σ = 256262258. Its totient is φ = 256262256.

The previous prime is 256262219. The next prime is 256262287. The reversal of 256262257 is 752262652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188348176 + 67914081 = 13724^2 + 8241^2 .

It is a cyclic number.

It is not a de Polignac number, because 256262257 - 2²³ = 247873649 is a prime.

It is not a weakly prime, because it can be changed into another prime (256262287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128131128 + 128131129.

It is an arithmetic number, because the mean of its divisors is an integer number (128131129).

Almost surely, 2^256262257 is an apocalyptic number.

It is an amenable number.

256262257 is a deficient number, since it is larger than the sum of its proper divisors (1).

256262257 is an equidigital number, since it uses as much as digits as its factorization.

256262257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100800, while the sum is 37.

The square root of 256262257 is about 16008.1934333641. The cubic root of 256262257 is about 635.1771733695.

The spelling of 256262257 in words is "two hundred fifty-six million, two hundred sixty-two thousand, two hundred fifty-seven".