1249992144 has 30 divisors (see below), whose sum is σ = 3498242306. Its totient is φ = 416664000.

The previous prime is 1249992131. The next prime is 1249992151. The reversal of 1249992144 is 4412999421.

It is a happy number.

1249992144 is a `hidden beast` number, since 12 + 499 + 9 + 2 + 144 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1232852544 + 17139600 = 35112^2 + 4140^2 .

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1249992144.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 4340107 + ... + 4340394.

Almost surely, 2^1249992144 is an apocalyptic number.

It is an amenable number.

1249992144 is an abundant number, since it is smaller than the sum of its proper divisors (2248250162).

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

1249992144 is a wasteful number, since it uses less digits than its factorization.

1249992144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8680515 (or 8680506 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 1249992144 is about 35355.2279585354. The cubic root of 1249992144 is about 1077.2150883127.

The spelling of 1249992144 in words is "one billion, two hundred forty-nine million, nine hundred ninety-two thousand, one hundred forty-four".