257070725 has 12 divisors (see below), whose sum is σ = 319417056. Its totient is φ = 205237680.

The previous prime is 257070721. The next prime is 257070731. The reversal of 257070725 is 527070752.

257070725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 257070725 - 2² = 257070721 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257070721) 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, 2354 + ... + 22796.

It is an arithmetic number, because the mean of its divisors is an integer number (26618088).

Almost surely, 2^257070725 is an apocalyptic number.

257070725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

257070725 is a deficient number, since it is larger than the sum of its proper divisors (62346331).

257070725 is a wasteful number, since it uses less digits than its factorization.

257070725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20956 (or 20951 counting only the distinct ones).

The product of its (nonzero) digits is 34300, while the sum is 35.

The square root of 257070725 is about 16033.4252422868. The cubic root of 257070725 is about 635.8444342497.

The spelling of 257070725 in words is "two hundred fifty-seven million, seventy thousand, seven hundred twenty-five".