258657245 has 16 divisors (see below), whose sum is σ = 386978688. Its totient is φ = 161240640.

The previous prime is 258657209. The next prime is 258657251. The reversal of 258657245 is 542756852.

It is not a de Polignac number, because 258657245 - 2⁶ = 258657181 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 258657196 and 258657205.

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 15 ways as a sum of consecutive naturals, for example, 335534 + ... + 336303.

It is an arithmetic number, because the mean of its divisors is an integer number (24186168).

Almost surely, 2^258657245 is an apocalyptic number.

It is an amenable number.

258657245 is a deficient number, since it is larger than the sum of its proper divisors (128321443).

258657245 is a wasteful number, since it uses less digits than its factorization.

258657245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671860.

The product of its digits is 672000, while the sum is 44.

The square root of 258657245 is about 16082.8245342664. The cubic root of 258657245 is about 637.1497971468.

The spelling of 258657245 in words is "two hundred fifty-eight million, six hundred fifty-seven thousand, two hundred forty-five".