257374735 has 4 divisors (see below), whose sum is σ = 308849688. Its totient is φ = 205899784.

The previous prime is 257374729. The next prime is 257374751. The reversal of 257374735 is 537473752.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257374735 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 257374691 and 257374700.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25737469 + ... + 25737478.

It is an arithmetic number, because the mean of its divisors is an integer number (77212422).

Almost surely, 2^257374735 is an apocalyptic number.

257374735 is a deficient number, since it is larger than the sum of its proper divisors (51474953).

257374735 is an equidigital number, since it uses as much as digits as its factorization.

257374735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51474952.

The product of its digits is 617400, while the sum is 43.

The square root of 257374735 is about 16042.9029480328. The cubic root of 257374735 is about 636.0949838691.

The spelling of 257374735 in words is "two hundred fifty-seven million, three hundred seventy-four thousand, seven hundred thirty-five".