257349012 has 12 divisors (see below), whose sum is σ = 600481056. Its totient is φ = 85783000.

The previous prime is 257348999. The next prime is 257349013. The reversal of 257349012 is 210943752.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×257349012² = 132457027954752288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257349013) 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, 10722864 + ... + 10722887.

It is an arithmetic number, because the mean of its divisors is an integer number (50040088).

Almost surely, 2^257349012 is an apocalyptic number.

It is an amenable number.

257349012 is an abundant number, since it is smaller than the sum of its proper divisors (343132044).

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

257349012 is a wasteful number, since it uses less digits than its factorization.

257349012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21445758 (or 21445756 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 257349012 is about 16042.1012339406. The cubic root of 257349012 is about 636.0737919205.

The spelling of 257349012 in words is "two hundred fifty-seven million, three hundred forty-nine thousand, twelve".