1231249472 has 28 divisors (see below), whose sum is σ = 2447672016. Its totient is φ = 614513280.

The previous prime is 1231249447. The next prime is 1231249493. The reversal of 1231249472 is 2749421321.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18947 + ... + 53117.

Almost surely, 2^1231249472 is an apocalyptic number.

It is an amenable number.

1231249472 is a deficient number, since it is larger than the sum of its proper divisors (1216422544).

1231249472 is an equidigital number, since it uses as much as digits as its factorization.

1231249472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34746 (or 34736 counting only the distinct ones).

The product of its digits is 24192, while the sum is 35.

The square root of 1231249472 is about 35089.1645953562. The cubic root of 1231249472 is about 1071.8039479596.

The spelling of 1231249472 in words is "one billion, two hundred thirty-one million, two hundred forty-nine thousand, four hundred seventy-two".