251442120 has 32 divisors (see below), whose sum is σ = 754326720. Its totient is φ = 67051200.

The previous prime is 251442097. The next prime is 251442203. The reversal of 251442120 is 21244152.

251442120 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1047556 + ... + 1047795.

It is an arithmetic number, because the mean of its divisors is an integer number (23572710).

Almost surely, 2^251442120 is an apocalyptic number.

251442120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251442120 is an abundant number, since it is smaller than the sum of its proper divisors (502884600).

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

251442120 is a wasteful number, since it uses less digits than its factorization.

251442120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2095365 (or 2095361 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 251442120 is about 15856.9265622314. The cubic root of 251442120 is about 631.1695081500.

Adding to 251442120 its reverse (21244152), we get a palindrome (272686272).

The spelling of 251442120 in words is "two hundred fifty-one million, four hundred forty-two thousand, one hundred twenty".