257245512 has 16 divisors (see below), whose sum is σ = 643113840. Its totient is φ = 85748496.

The previous prime is 257245489. The next prime is 257245519. The reversal of 257245512 is 215542752.

It is not an unprimeable number, because it can be changed into a prime (257245519) 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, 5359258 + ... + 5359305.

It is an arithmetic number, because the mean of its divisors is an integer number (40194615).

Almost surely, 2^257245512 is an apocalyptic number.

It is an amenable number.

257245512 is an abundant number, since it is smaller than the sum of its proper divisors (385868328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257245512 is a wasteful number, since it uses less digits than its factorization.

257245512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10718572 (or 10718568 counting only the distinct ones).

The product of its digits is 28000, while the sum is 33.

The square root of 257245512 is about 16038.8750228936. The cubic root of 257245512 is about 635.9885089495.

It can be divided in two parts, 2572 and 45512, that added together give a palindrome (48084).

The spelling of 257245512 in words is "two hundred fifty-seven million, two hundred forty-five thousand, five hundred twelve".