257089061 has 8 divisors (see below), whose sum is σ = 269021304. Its totient is φ = 245419200.

The previous prime is 257089051. The next prime is 257089067. The reversal of 257089061 is 160980752.

It can be written as a sum of positive squares in 4 ways, for example, as 107516161 + 149572900 = 10369^2 + 12230^2 .

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 257089061 - 2²² = 252894757 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 (257089067) 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, 63590 + ... + 67511.

It is an arithmetic number, because the mean of its divisors is an integer number (33627663).

Almost surely, 2^257089061 is an apocalyptic number.

It is an amenable number.

257089061 is a deficient number, since it is larger than the sum of its proper divisors (11932243).

257089061 is a wasteful number, since it uses less digits than its factorization.

257089061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131191.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 257089061 is about 16033.9970375449. The cubic root of 257089061 is about 635.8595514467.

The spelling of 257089061 in words is "two hundred fifty-seven million, eighty-nine thousand, sixty-one".