257605141 has 4 divisors (see below), whose sum is σ = 258674284. Its totient is φ = 256536000.

The previous prime is 257605121. The next prime is 257605157. The reversal of 257605141 is 141506752.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 107640625 + 149964516 = 10375^2 + 12246^2 .

It is a cyclic number.

It is not a de Polignac number, because 257605141 - 2⁵ = 257605109 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 (257605121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 534210 + ... + 534691.

It is an arithmetic number, because the mean of its divisors is an integer number (64668571).

Almost surely, 2^257605141 is an apocalyptic number.

It is an amenable number.

257605141 is a deficient number, since it is larger than the sum of its proper divisors (1069143).

257605141 is a wasteful number, since it uses less digits than its factorization.

257605141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069142.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 257605141 is about 16050.0822739324. The cubic root of 257605141 is about 636.2847414072.

The spelling of 257605141 in words is "two hundred fifty-seven million, six hundred five thousand, one hundred forty-one".