251253126 has 12 divisors (see below), whose sum is σ = 544381812. Its totient is φ = 83751036.

The previous prime is 251253113. The next prime is 251253157. The reversal of 251253126 is 621352152.

It is a happy 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 251253126.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6979236 + ... + 6979271.

It is an arithmetic number, because the mean of its divisors is an integer number (45365151).

Almost surely, 2^251253126 is an apocalyptic number.

251253126 is an abundant number, since it is smaller than the sum of its proper divisors (293128686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

251253126 is a wasteful number, since it uses less digits than its factorization.

251253126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13958515 (or 13958512 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 251253126 is about 15850.9660904312. The cubic root of 251253126 is about 631.0113310587.

The spelling of 251253126 in words is "two hundred fifty-one million, two hundred fifty-three thousand, one hundred twenty-six".