320134257 has 12 divisors (see below), whose sum is σ = 471141684. Its totient is φ = 209395680.

The previous prime is 320134247. The next prime is 320134261. The reversal of 320134257 is 752431023.

It can be written as a sum of positive squares in 2 ways, for example, as 127035441 + 193098816 = 11271^2 + 13896^2 .

It is not a de Polignac number, because 320134257 - 2⁶ = 320134193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320134257.

It is not an unprimeable number, because it can be changed into a prime (320134207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 335094 + ... + 336047.

It is an arithmetic number, because the mean of its divisors is an integer number (39261807).

Almost surely, 2^320134257 is an apocalyptic number.

It is an amenable number.

320134257 is a deficient number, since it is larger than the sum of its proper divisors (151007427).

320134257 is a wasteful number, since it uses less digits than its factorization.

320134257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671200 (or 671197 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 320134257 is about 17892.2960237081. The cubic root of 320134257 is about 684.0860220630.

The spelling of 320134257 in words is "three hundred twenty million, one hundred thirty-four thousand, two hundred fifty-seven".