257158045 has 8 divisors (see below), whose sum is σ = 308678400. Its totient is φ = 205667280.

The previous prime is 257158039. The next prime is 257158063. The reversal of 257158045 is 540851752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 257158045 - 2³ = 257158037 is a prime.

It is a super-2 number, since 2×257158045² = 132260520216444050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 257157995 and 257158013.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23356 + ... + 32554.

It is an arithmetic number, because the mean of its divisors is an integer number (38584800).

Almost surely, 2^257158045 is an apocalyptic number.

It is an amenable number.

257158045 is a deficient number, since it is larger than the sum of its proper divisors (51520355).

257158045 is an equidigital number, since it uses as much as digits as its factorization.

257158045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14795.

The product of its (nonzero) digits is 56000, while the sum is 37.

The square root of 257158045 is about 16036.1480724019. The cubic root of 257158045 is about 635.9164191749.

The spelling of 257158045 in words is "two hundred fifty-seven million, one hundred fifty-eight thousand, forty-five".