256461274 has 8 divisors (see below), whose sum is σ = 385145460. Its totient is φ = 128079456.

The previous prime is 256461241. The next prime is 256461277. The reversal of 256461274 is 472164652.

It can be written as a sum of positive squares in 2 ways, for example, as 254881225 + 1580049 = 15965^2 + 1257^2 .

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

It is not an unprimeable number, because it can be changed into a prime (256461277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73459 + ... + 76870.

Almost surely, 2^256461274 is an apocalyptic number.

256461274 is a deficient number, since it is larger than the sum of its proper divisors (128684186).

256461274 is a wasteful number, since it uses less digits than its factorization.

256461274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151184.

The product of its digits is 80640, while the sum is 37.

The square root of 256461274 is about 16014.4083250053. The cubic root of 256461274 is about 635.3415601021.

The spelling of 256461274 in words is "two hundred fifty-six million, four hundred sixty-one thousand, two hundred seventy-four".