1251144992 has 24 divisors (see below), whose sum is σ = 2464015932. Its totient is φ = 625363200.

The previous prime is 1251144989. The next prime is 1251144997. The reversal of 1251144992 is 2994411521.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1233133456 + 18011536 = 35116^2 + 4244^2 .

It is not an unprimeable number, because it can be changed into a prime (1251144997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143642 + ... + 152102.

Almost surely, 2^1251144992 is an apocalyptic number.

It is an amenable number.

1251144992 is a deficient number, since it is larger than the sum of its proper divisors (1212870940).

1251144992 is an equidigital number, since it uses as much as digits as its factorization.

1251144992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13092 (or 13084 counting only the distinct ones).

The product of its digits is 25920, while the sum is 38.

The square root of 1251144992 is about 35371.5279850899. The cubic root of 1251144992 is about 1077.5461527057.

The spelling of 1251144992 in words is "one billion, two hundred fifty-one million, one hundred forty-four thousand, nine hundred ninety-two".