251125442 has 16 divisors (see below), whose sum is σ = 390200760. Its totient is φ = 121070208.

The previous prime is 251125423. The next prime is 251125453. The reversal of 251125442 is 244521152.

It can be written as a sum of positive squares in 4 ways, for example, as 238671601 + 12453841 = 15449^2 + 3529^2 .

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 7 ways as a sum of consecutive naturals, for example, 48398 + ... + 53334.

Almost surely, 2^251125442 is an apocalyptic number.

251125442 is a deficient number, since it is larger than the sum of its proper divisors (139075318).

251125442 is a wasteful number, since it uses less digits than its factorization.

251125442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5845.

The product of its digits is 3200, while the sum is 26.

The square root of 251125442 is about 15846.9379376585. The cubic root of 251125442 is about 630.9044220035.

Adding to 251125442 its reverse (244521152), we get a palindrome (495646594).

The spelling of 251125442 in words is "two hundred fifty-one million, one hundred twenty-five thousand, four hundred forty-two".