257012722 has 4 divisors (see below), whose sum is σ = 385519086. Its totient is φ = 128506360.

The previous prime is 257012683. The next prime is 257012729. The reversal of 257012722 is 227210752.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 253096281 + 3916441 = 15909^2 + 1979^2 .

It is not an unprimeable number, because it can be changed into a prime (257012729) by changing a digit.

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 as a sum of consecutive naturals, namely, 64253179 + ... + 64253182.

Almost surely, 2^257012722 is an apocalyptic number.

257012722 is a deficient number, since it is larger than the sum of its proper divisors (128506364).

257012722 is a wasteful number, since it uses less digits than its factorization.

257012722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128506363.

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 257012722 is about 16031.6163252493. The cubic root of 257012722 is about 635.7966086836.

The spelling of 257012722 in words is "two hundred fifty-seven million, twelve thousand, seven hundred twenty-two".