257462661 has 4 divisors (see below), whose sum is σ = 343283552. Its totient is φ = 171641772.

The previous prime is 257462641. The next prime is 257462677. The reversal of 257462661 is 166264752.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 257462661 - 2¹³ = 257454469 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 (257462641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42910441 + ... + 42910446.

It is an arithmetic number, because the mean of its divisors is an integer number (85820888).

Almost surely, 2^257462661 is an apocalyptic number.

It is an amenable number.

257462661 is a deficient number, since it is larger than the sum of its proper divisors (85820891).

257462661 is an equidigital number, since it uses as much as digits as its factorization.

257462661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85820890.

The product of its digits is 120960, while the sum is 39.

The square root of 257462661 is about 16045.6430534896. The cubic root of 257462661 is about 636.1674112317.

The spelling of 257462661 in words is "two hundred fifty-seven million, four hundred sixty-two thousand, six hundred sixty-one".