257060749 has 6 divisors (see below), whose sum is σ = 282554510. Its totient is φ = 233691480.

The previous prime is 257060737. The next prime is 257060789. The reversal of 257060749 is 947060752.

It can be written as a sum of positive squares in only one way, i.e., 145082025 + 111978724 = 12045^2 + 10582^2 .

It is not a de Polignac number, because 257060749 - 2²⁵ = 223506317 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 (257060729) 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 in 5 ways as a sum of consecutive naturals, for example, 1062114 + ... + 1062355.

Almost surely, 2^257060749 is an apocalyptic number.

It is an amenable number.

257060749 is a deficient number, since it is larger than the sum of its proper divisors (25493761).

257060749 is a wasteful number, since it uses less digits than its factorization.

257060749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2124491 (or 2124480 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 257060749 is about 16033.1141391808. The cubic root of 257060749 is about 635.8362091901.

The spelling of 257060749 in words is "two hundred fifty-seven million, sixty thousand, seven hundred forty-nine".