257258995 has 8 divisors (see below), whose sum is σ = 352812384. Its totient is φ = 176406144.

The previous prime is 257258941. The next prime is 257258999. The reversal of 257258995 is 599852752.

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 257258995 - 2⁷ = 257258867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257258999) by changing a digit.

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, 3675094 + ... + 3675163.

It is an arithmetic number, because the mean of its divisors is an integer number (44101548).

Almost surely, 2^257258995 is an apocalyptic number.

257258995 is a deficient number, since it is larger than the sum of its proper divisors (95553389).

257258995 is an equidigital number, since it uses as much as digits as its factorization.

257258995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7350269.

The product of its digits is 2268000, while the sum is 52.

The square root of 257258995 is about 16039.2953398832. The cubic root of 257258995 is about 635.9996201031. Note that the first 3 decimals are identical.

The spelling of 257258995 in words is "two hundred fifty-seven million, two hundred fifty-eight thousand, nine hundred ninety-five".