256410259 has 8 divisors (see below), whose sum is σ = 300960608. Its totient is φ = 213840000.

The previous prime is 256410251. The next prime is 256410281. The reversal of 256410259 is 952014652.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256410259 - 2³ = 256410251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256410251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 494742 + ... + 495259.

It is an arithmetic number, because the mean of its divisors is an integer number (37620076).

Almost surely, 2^256410259 is an apocalyptic number.

256410259 is a deficient number, since it is larger than the sum of its proper divisors (44550349).

256410259 is an equidigital number, since it uses as much as digits as its factorization.

256410259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990045.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 256410259 is about 16012.8154613734. The cubic root of 256410259 is about 635.2994301559.

The spelling of 256410259 in words is "two hundred fifty-six million, four hundred ten thousand, two hundred fifty-nine".