257343074 has 8 divisors (see below), whose sum is σ = 386339628. Its totient is φ = 128563200.

The previous prime is 257343043. The next prime is 257343137. The reversal of 257343074 is 470343752.

It can be written as a sum of positive squares in 2 ways, for example, as 249418849 + 7924225 = 15793^2 + 2815^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 51167 + ... + 55970.

Almost surely, 2^257343074 is an apocalyptic number.

257343074 is a deficient number, since it is larger than the sum of its proper divisors (128996554).

257343074 is a wasteful number, since it uses less digits than its factorization.

257343074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108340.

The product of its (nonzero) digits is 70560, while the sum is 35.

The square root of 257343074 is about 16041.9161573672. The cubic root of 257343074 is about 636.0688996859.

The spelling of 257343074 in words is "two hundred fifty-seven million, three hundred forty-three thousand, seventy-four".