1249795144 has 32 divisors (see below), whose sum is σ = 2529414720. Its totient is φ = 575505216.

The previous prime is 1249795133. The next prime is 1249795147. The reversal of 1249795144 is 4415979421.

It is a junction number, because it is equal to n+sod(n) for n = 1249795094 and 1249795103.

It is not an unprimeable number, because it can be changed into a prime (1249795147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32509 + ... + 59635.

It is an arithmetic number, because the mean of its divisors is an integer number (79044210).

Almost surely, 2^1249795144 is an apocalyptic number.

It is an amenable number.

1249795144 is an abundant number, since it is smaller than the sum of its proper divisors (1279619576).

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

1249795144 is a wasteful number, since it uses less digits than its factorization.

1249795144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27589 (or 27585 counting only the distinct ones).

The product of its digits is 362880, while the sum is 46.

The square root of 1249795144 is about 35352.4418392846. The cubic root of 1249795144 is about 1077.1584952846.

The spelling of 1249795144 in words is "one billion, two hundred forty-nine million, seven hundred ninety-five thousand, one hundred forty-four".