257142858 has 16 divisors (see below), whose sum is σ = 587755200. Its totient is φ = 73469376.

The previous prime is 257142841. The next prime is 257142863. The reversal of 257142858 is 858241752.

257142858 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×257142858² = 132244898840816328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 6122449 = 257142858 / (2 + 5 + 7 + 1 + 4 + 2 + 8 + 5 + 8).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3061183 + ... + 3061266.

It is an arithmetic number, because the mean of its divisors is an integer number (36734700).

Almost surely, 2^257142858 is an apocalyptic number.

257142858 is an abundant number, since it is smaller than the sum of its proper divisors (330612342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257142858 is a wasteful number, since it uses less digits than its factorization.

257142858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6122461.

The product of its digits is 179200, while the sum is 42.

The square root of 257142858 is about 16035.6745414716. The cubic root of 257142858 is about 635.9039004756.

The spelling of 257142858 in words is "two hundred fifty-seven million, one hundred forty-two thousand, eight hundred fifty-eight".