257740075 has 6 divisors (see below), whose sum is σ = 319597724. Its totient is φ = 206192040.

The previous prime is 257740069. The next prime is 257740099. The reversal of 257740075 is 570047752.

It is not a de Polignac number, because 257740075 - 2⁷ = 257739947 is a prime.

It is a super-2 number, since 2×257740075² = 132859892522011250, which contains 22 as substring.

It is a Duffinian 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 5 ways as a sum of consecutive naturals, for example, 5154777 + ... + 5154826.

Almost surely, 2^257740075 is an apocalyptic number.

257740075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

257740075 is a deficient number, since it is larger than the sum of its proper divisors (61857649).

257740075 is a wasteful number, since it uses less digits than its factorization.

257740075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10309613 (or 10309608 counting only the distinct ones).

The product of its (nonzero) digits is 68600, while the sum is 37.

The square root of 257740075 is about 16054.2852534767. The cubic root of 257740075 is about 636.3958176830.

The spelling of 257740075 in words is "two hundred fifty-seven million, seven hundred forty thousand, seventy-five".