1249639752 has 16 divisors (see below), whose sum is σ = 3124099440. Its totient is φ = 416546576.

The previous prime is 1249639751. The next prime is 1249639759. The reversal of 1249639752 is 2579369421.

It is not an unprimeable number, because it can be changed into a prime (1249639751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26034138 + ... + 26034185.

It is an arithmetic number, because the mean of its divisors is an integer number (195256215).

Almost surely, 2^1249639752 is an apocalyptic number.

1249639752 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1249639752 is an abundant number, since it is smaller than the sum of its proper divisors (1874459688).

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

1249639752 is a wasteful number, since it uses less digits than its factorization.

1249639752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52068332 (or 52068328 counting only the distinct ones).

The product of its digits is 816480, while the sum is 48.

The square root of 1249639752 is about 35350.2440161309. The cubic root of 1249639752 is about 1077.1138509679.

The spelling of 1249639752 in words is "one billion, two hundred forty-nine million, six hundred thirty-nine thousand, seven hundred fifty-two".