258251257 has 4 divisors (see below), whose sum is σ = 281728656. Its totient is φ = 234773860.

The previous prime is 258251239. The next prime is 258251261. The reversal of 258251257 is 752152852.

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 a cyclic number.

It is not a de Polignac number, because 258251257 - 2¹⁵ = 258218489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (258251207) 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, 11738683 + ... + 11738704.

It is an arithmetic number, because the mean of its divisors is an integer number (70432164).

Almost surely, 2^258251257 is an apocalyptic number.

It is an amenable number.

258251257 is a deficient number, since it is larger than the sum of its proper divisors (23477399).

258251257 is a wasteful number, since it uses less digits than its factorization.

258251257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23477398.

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

The square root of 258251257 is about 16070.1977896975. The cubic root of 258251257 is about 636.8162661468.

The spelling of 258251257 in words is "two hundred fifty-eight million, two hundred fifty-one thousand, two hundred fifty-seven".