257025284 has 6 divisors (see below), whose sum is σ = 449794254. Its totient is φ = 128512640.

The previous prime is 257025283. The next prime is 257025287. The reversal of 257025284 is 482520752.

It can be written as a sum of positive squares in only one way, i.e., 202265284 + 54760000 = 14222^2 + 7400^2 .

It is not an unprimeable number, because it can be changed into a prime (257025283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32128157 + ... + 32128164.

It is an arithmetic number, because the mean of its divisors is an integer number (74965709).

Almost surely, 2^257025284 is an apocalyptic number.

It is an amenable number.

257025284 is a deficient number, since it is larger than the sum of its proper divisors (192768970).

257025284 is a wasteful number, since it uses less digits than its factorization.

257025284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64256325 (or 64256323 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 35.

The square root of 257025284 is about 16032.0081087804. The cubic root of 257025284 is about 635.8069671162.

The spelling of 257025284 in words is "two hundred fifty-seven million, twenty-five thousand, two hundred eighty-four".