257040012 has 12 divisors (see below), whose sum is σ = 599760056. Its totient is φ = 85680000.

The previous prime is 257039971. The next prime is 257040013. The reversal of 257040012 is 210040752.

257040012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (257040013) 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, 10709989 + ... + 10710012.

Almost surely, 2^257040012 is an apocalyptic number.

It is an amenable number.

257040012 is an abundant number, since it is smaller than the sum of its proper divisors (342720044).

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

257040012 is a wasteful number, since it uses less digits than its factorization.

257040012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21420008 (or 21420006 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 257040012 is about 16032.4674333055. The cubic root of 257040012 is about 635.8191111694.

Adding to 257040012 its reverse (210040752), we get a palindrome (467080764).

The spelling of 257040012 in words is "two hundred fifty-seven million, forty thousand, twelve".