257614643 has 12 divisors (see below), whose sum is σ = 304317288. Its totient is φ = 216178560.

The previous prime is 257614613. The next prime is 257614667. The reversal of 257614643 is 346416752.

It is a happy number.

It is not a de Polignac number, because 257614643 - 2⁶ = 257614579 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 257614597 and 257614606.

It is not an unprimeable number, because it can be changed into a prime (257614613) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 67430 + ... + 71147.

It is an arithmetic number, because the mean of its divisors is an integer number (25359774).

Almost surely, 2^257614643 is an apocalyptic number.

257614643 is a deficient number, since it is larger than the sum of its proper divisors (46702645).

257614643 is a wasteful number, since it uses less digits than its factorization.

257614643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138614 (or 138601 counting only the distinct ones).

The product of its digits is 120960, while the sum is 38.

The square root of 257614643 is about 16050.3782821465. The cubic root of 257614643 is about 636.2925646249.

The spelling of 257614643 in words is "two hundred fifty-seven million, six hundred fourteen thousand, six hundred forty-three".