1231224732 has 48 divisors (see below), whose sum is σ = 3244410400. Its totient is φ = 403678080.

The previous prime is 1231224727. The next prime is 1231224749. The reversal of 1231224732 is 2374221321.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1231224696 and 1231224705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86857 + ... + 100032.

Almost surely, 2^1231224732 is an apocalyptic number.

1231224732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1231224732 is an abundant number, since it is smaller than the sum of its proper divisors (2013185668).

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

1231224732 is a wasteful number, since it uses less digits than its factorization.

1231224732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186963 (or 186955 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 1231224732 is about 35088.8120631064. The cubic root of 1231224732 is about 1071.7967691796.

The spelling of 1231224732 in words is "one billion, two hundred thirty-one million, two hundred twenty-four thousand, seven hundred thirty-two".