256954457 has 4 divisors (see below), whose sum is σ = 256986576. Its totient is φ = 256922340.

The previous prime is 256954433. The next prime is 256954469. The reversal of 256954457 is 754459652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 256954457 - 2²² = 252760153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256954487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6578 + ... + 23604.

It is an arithmetic number, because the mean of its divisors is an integer number (64246644).

Almost surely, 2^256954457 is an apocalyptic number.

It is an amenable number.

256954457 is a deficient number, since it is larger than the sum of its proper divisors (32119).

256954457 is a wasteful number, since it uses less digits than its factorization.

256954457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32118.

The product of its digits is 1512000, while the sum is 47.

The square root of 256954457 is about 16029.7990318032. The cubic root of 256954457 is about 635.7485598440.

The spelling of 256954457 in words is "two hundred fifty-six million, nine hundred fifty-four thousand, four hundred fifty-seven".