256501411 has 2 divisors, whose sum is σ = 256501412. Its totient is φ = 256501410.

The previous prime is 256501403. The next prime is 256501417. The reversal of 256501411 is 114105652.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256501411 - 2³ = 256501403 is a prime.

It is not a weakly prime, because it can be changed into another prime (256501417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128250705 + 128250706.

It is an arithmetic number, because the mean of its divisors is an integer number (128250706).

Almost surely, 2^256501411 is an apocalyptic number.

256501411 is a deficient number, since it is larger than the sum of its proper divisors (1).

256501411 is an equidigital number, since it uses as much as digits as its factorization.

256501411 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 256501411 is about 16015.6614287391. The cubic root of 256501411 is about 635.3747026940.

The spelling of 256501411 in words is "two hundred fifty-six million, five hundred one thousand, four hundred eleven".