1231457732 has 12 divisors (see below), whose sum is σ = 2184572796. Its totient is φ = 607294080.

The previous prime is 1231457701. The next prime is 1231457807. The reversal of 1231457732 is 2377541321.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 721781956 + 509675776 = 26866^2 + 22576^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1231457692 and 1231457701.

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, 2108369 + ... + 2108952.

It is an arithmetic number, because the mean of its divisors is an integer number (182047733).

Almost surely, 2^1231457732 is an apocalyptic number.

It is an amenable number.

1231457732 is a deficient number, since it is larger than the sum of its proper divisors (953115064).

1231457732 is a wasteful number, since it uses less digits than its factorization.

1231457732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4217398 (or 4217396 counting only the distinct ones).

The product of its digits is 35280, while the sum is 35.

The square root of 1231457732 is about 35092.1320526411. The cubic root of 1231457732 is about 1071.8643747351.

The spelling of 1231457732 in words is "one billion, two hundred thirty-one million, four hundred fifty-seven thousand, seven hundred thirty-two".