257117061 has 16 divisors (see below), whose sum is σ = 363400128. Its totient is φ = 161145600.

The previous prime is 257117059. The next prime is 257117071. The reversal of 257117061 is 160711752.

It is not a de Polignac number, because 257117061 - 2¹ = 257117059 is a prime.

It is a super-2 number, since 2×257117061² = 132218366114555442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257117051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53331 + ... + 57951.

It is an arithmetic number, because the mean of its divisors is an integer number (22712508).

Almost surely, 2^257117061 is an apocalyptic number.

It is an amenable number.

257117061 is a deficient number, since it is larger than the sum of its proper divisors (106283067).

257117061 is a wasteful number, since it uses less digits than its factorization.

257117061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5732.

The product of its (nonzero) digits is 2940, while the sum is 30.

The square root of 257117061 is about 16034.8701585014. The cubic root of 257117061 is about 635.8826347848.

The spelling of 257117061 in words is "two hundred fifty-seven million, one hundred seventeen thousand, sixty-one".