257245004 has 12 divisors (see below), whose sum is σ = 450323328. Its totient is φ = 128581200.

The previous prime is 257244973. The next prime is 257245057. The reversal of 257245004 is 400542752.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6869 + ... + 23699.

It is an arithmetic number, because the mean of its divisors is an integer number (37526944).

Almost surely, 2^257245004 is an apocalyptic number.

It is an amenable number.

257245004 is a deficient number, since it is larger than the sum of its proper divisors (193078324).

257245004 is a wasteful number, since it uses less digits than its factorization.

257245004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20656 (or 20654 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 29.

The square root of 257245004 is about 16038.8591863636. The cubic root of 257245004 is about 635.9880903061.

Adding to 257245004 its reverse (400542752), we get a palindrome (657787756).

The spelling of 257245004 in words is "two hundred fifty-seven million, two hundred forty-five thousand, four".