257149694 has 4 divisors (see below), whose sum is σ = 385724544. Its totient is φ = 128574846.

The previous prime is 257149691. The next prime is 257149721. The reversal of 257149694 is 496941752.

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

It is a super-2 number, since 2×257149694² = 132251930248587272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257149691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64287422 + ... + 64287425.

It is an arithmetic number, because the mean of its divisors is an integer number (96431136).

Almost surely, 2^257149694 is an apocalyptic number.

257149694 is a deficient number, since it is larger than the sum of its proper divisors (128574850).

257149694 is a wasteful number, since it uses less digits than its factorization.

257149694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128574849.

The product of its digits is 544320, while the sum is 47.

The square root of 257149694 is about 16035.8876898038. The cubic root of 257149694 is about 635.9095354762.

The spelling of 257149694 in words is "two hundred fifty-seven million, one hundred forty-nine thousand, six hundred ninety-four".