257420674 has 16 divisors (see below), whose sum is σ = 442248768. Its totient is φ = 110084112.

The previous prime is 257420641. The next prime is 257420677. The reversal of 257420674 is 476024752.

It is a super-2 number, since 2×257420674² = 132530806805228552, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (257420677) 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 7 ways as a sum of consecutive naturals, for example, 13149 + ... + 26224.

It is an arithmetic number, because the mean of its divisors is an integer number (27640548).

Almost surely, 2^257420674 is an apocalyptic number.

257420674 is a deficient number, since it is larger than the sum of its proper divisors (184828094).

257420674 is a wasteful number, since it uses less digits than its factorization.

257420674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39849.

The product of its (nonzero) digits is 94080, while the sum is 37.

The square root of 257420674 is about 16044.3346387440. The cubic root of 257420674 is about 636.1328273000.

The spelling of 257420674 in words is "two hundred fifty-seven million, four hundred twenty thousand, six hundred seventy-four".