256742467 has 8 divisors (see below), whose sum is σ = 258701040. Its totient is φ = 254791680.

The previous prime is 256742443. The next prime is 256742471. The reversal of 256742467 is 764247652.

256742467 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256742467 is a prime.

It is a super-2 number, since 2×256742467² = 131833388722492178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256742407) 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, 75459 + ... + 78787.

It is an arithmetic number, because the mean of its divisors is an integer number (32337630).

Almost surely, 2^256742467 is an apocalyptic number.

256742467 is a deficient number, since it is larger than the sum of its proper divisors (1958573).

256742467 is a wasteful number, since it uses less digits than its factorization.

256742467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3893.

The product of its digits is 564480, while the sum is 43.

The square root of 256742467 is about 16023.1852950654. The cubic root of 256742467 is about 635.5736787664.

The spelling of 256742467 in words is "two hundred fifty-six million, seven hundred forty-two thousand, four hundred sixty-seven".