258506426 has 4 divisors (see below), whose sum is σ = 387759642. Its totient is φ = 129253212.

The previous prime is 258506401. The next prime is 258506441. The reversal of 258506426 is 624605852.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 249798025 + 8708401 = 15805^2 + 2951^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 258506426.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64626605 + ... + 64626608.

Almost surely, 2^258506426 is an apocalyptic number.

258506426 is a deficient number, since it is larger than the sum of its proper divisors (129253216).

258506426 is a wasteful number, since it uses less digits than its factorization.

258506426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129253215.

The product of its (nonzero) digits is 115200, while the sum is 38.

The square root of 258506426 is about 16078.1350286655. The cubic root of 258506426 is about 637.0259357044.

The spelling of 258506426 in words is "two hundred fifty-eight million, five hundred six thousand, four hundred twenty-six".