257270791 has 8 divisors (see below), whose sum is σ = 259510160. Its totient is φ = 255037248.

The previous prime is 257270779. The next prime is 257270813. The reversal of 257270791 is 197072752.

It is a happy number.

257270791 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 257270791 - 2⁵ = 257270759 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 (257270711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154435 + ... + 156091.

It is an arithmetic number, because the mean of its divisors is an integer number (32438770).

Almost surely, 2^257270791 is an apocalyptic number.

257270791 is a deficient number, since it is larger than the sum of its proper divisors (2239369).

257270791 is a wasteful number, since it uses less digits than its factorization.

257270791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2913.

The product of its (nonzero) digits is 61740, while the sum is 40.

The square root of 257270791 is about 16039.6630575583. The cubic root of 257270791 is about 636.0093407051.

The spelling of 257270791 in words is "two hundred fifty-seven million, two hundred seventy thousand, seven hundred ninety-one".