257851042 has 8 divisors (see below), whose sum is σ = 394074396. Its totient is φ = 126492912.

The previous prime is 257851031. The next prime is 257851043. The reversal of 257851042 is 240158752.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 249608401 + 8242641 = 15799^2 + 2871^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 257850989 and 257851007.

It is not an unprimeable number, because it can be changed into a prime (257851043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1216173 + ... + 1216384.

Almost surely, 2^257851042 is an apocalyptic number.

257851042 is a deficient number, since it is larger than the sum of its proper divisors (136223354).

257851042 is a wasteful number, since it uses less digits than its factorization.

257851042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2432612.

The product of its (nonzero) digits is 22400, while the sum is 34.

The square root of 257851042 is about 16057.7408747308. The cubic root of 257851042 is about 636.4871355251.

The spelling of 257851042 in words is "two hundred fifty-seven million, eight hundred fifty-one thousand, forty-two".