257070771 has 6 divisors (see below), whose sum is σ = 371324460. Its totient is φ = 171380508.

The previous prime is 257070769. The next prime is 257070791. The reversal of 257070771 is 177070752.

It is a happy number.

It is not a de Polignac number, because 257070771 - 2¹ = 257070769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (257070721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14281701 + ... + 14281718.

It is an arithmetic number, because the mean of its divisors is an integer number (61887410).

Almost surely, 2^257070771 is an apocalyptic number.

257070771 is a deficient number, since it is larger than the sum of its proper divisors (114253689).

257070771 is a wasteful number, since it uses less digits than its factorization.

257070771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28563425 (or 28563422 counting only the distinct ones).

The product of its (nonzero) digits is 24010, while the sum is 36.

The square root of 257070771 is about 16033.4266767900. The cubic root of 257070771 is about 635.8444721755.

It can be divided in two parts, 2570707 and 71, that added together give a triangular number (2570778 = T₂₂₆₇).

The spelling of 257070771 in words is "two hundred fifty-seven million, seventy thousand, seven hundred seventy-one".