1249639948 has 24 divisors (see below), whose sum is σ = 2242747584. Its totient is φ = 608966400.

The previous prime is 1249639939. The next prime is 1249639967. The reversal of 1249639948 is 8499369421.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31518 + ... + 59098.

It is an arithmetic number, because the mean of its divisors is an integer number (93447816).

Almost surely, 2^1249639948 is an apocalyptic number.

It is an amenable number.

1249639948 is a deficient number, since it is larger than the sum of its proper divisors (993107636).

1249639948 is a wasteful number, since it uses less digits than its factorization.

1249639948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27873 (or 27871 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 55.

The square root of 1249639948 is about 35350.2467883889. The cubic root of 1249639948 is about 1077.1139072813.

The spelling of 1249639948 in words is "one billion, two hundred forty-nine million, six hundred thirty-nine thousand, nine hundred forty-eight".