257420752 has 20 divisors (see below), whose sum is σ = 504359460. Its totient is φ = 127263488.

The previous prime is 257420743. The next prime is 257420753. The reversal of 257420752 is 257024752.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 50751376 + 206669376 = 7124^2 + 14376^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257420753) 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, 88963 + ... + 91810.

It is an arithmetic number, because the mean of its divisors is an integer number (25217973).

Almost surely, 2^257420752 is an apocalyptic number.

It is an amenable number.

257420752 is a deficient number, since it is larger than the sum of its proper divisors (246938708).

257420752 is a wasteful number, since it uses less digits than its factorization.

257420752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180870 (or 180864 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 34.

The square root of 257420752 is about 16044.3370695084. The cubic root of 257420752 is about 636.1328915507.

The spelling of 257420752 in words is "two hundred fifty-seven million, four hundred twenty thousand, seven hundred fifty-two".