258392945 has 8 divisors (see below), whose sum is σ = 328311144. Its totient is φ = 194554624.

The previous prime is 258392881. The next prime is 258392983. The reversal of 258392945 is 549293852.

It can be written as a sum of positive squares in 4 ways, for example, as 135094129 + 123298816 = 11623^2 + 11104^2 .

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 258392945 - 2⁶ = 258392881 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 258392945.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1519874 + ... + 1520043.

It is an arithmetic number, because the mean of its divisors is an integer number (41038893).

Almost surely, 2^258392945 is an apocalyptic number.

It is an amenable number.

258392945 is a deficient number, since it is larger than the sum of its proper divisors (69918199).

258392945 is a wasteful number, since it uses less digits than its factorization.

258392945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3039939.

The product of its digits is 777600, while the sum is 47.

The square root of 258392945 is about 16074.6055939174. The cubic root of 258392945 is about 636.9327066603.

The spelling of 258392945 in words is "two hundred fifty-eight million, three hundred ninety-two thousand, nine hundred forty-five".