1231972396 has 12 divisors (see below), whose sum is σ = 2156213248. Its totient is φ = 615911472.

The previous prime is 1231972393. The next prime is 1231972411. The reversal of 1231972396 is 6932791321.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1231972393) 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, 36565 + ... + 61651.

Almost surely, 2^1231972396 is an apocalyptic number.

It is an amenable number.

1231972396 is a deficient number, since it is larger than the sum of its proper divisors (924240852).

1231972396 is a wasteful number, since it uses less digits than its factorization.

1231972396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37368 (or 37366 counting only the distinct ones).

The product of its digits is 122472, while the sum is 43.

The square root of 1231972396 is about 35099.4643263968. The cubic root of 1231972396 is about 1072.0136756164.

The spelling of 1231972396 in words is "one billion, two hundred thirty-one million, nine hundred seventy-two thousand, three hundred ninety-six".