257274079 has 4 divisors (see below), whose sum is σ = 270814840. Its totient is φ = 243733320.

The previous prime is 257274071. The next prime is 257274103. The reversal of 257274079 is 970472752.

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

It is a cyclic number.

It is not a de Polignac number, because 257274079 - 2³ = 257274071 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 (257274071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6770352 + ... + 6770389.

It is an arithmetic number, because the mean of its divisors is an integer number (67703710).

Almost surely, 2^257274079 is an apocalyptic number.

257274079 is a deficient number, since it is larger than the sum of its proper divisors (13540761).

257274079 is a wasteful number, since it uses less digits than its factorization.

257274079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13540760.

The product of its (nonzero) digits is 246960, while the sum is 43.

The square root of 257274079 is about 16039.7655531495. The cubic root of 257274079 is about 636.0120501587.

The spelling of 257274079 in words is "two hundred fifty-seven million, two hundred seventy-four thousand, seventy-nine".