1231120432 has 40 divisors (see below), whose sum is σ = 2430625680. Its totient is φ = 603905280.

The previous prime is 1231120421. The next prime is 1231120439. The reversal of 1231120432 is 2340211321.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1231120439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 622998 + ... + 624970.

It is an arithmetic number, because the mean of its divisors is an integer number (60765642).

Almost surely, 2^1231120432 is an apocalyptic number.

It is an amenable number.

1231120432 is a deficient number, since it is larger than the sum of its proper divisors (1199505248).

1231120432 is a wasteful number, since it uses less digits than its factorization.

1231120432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2701 (or 2695 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1231120432 is about 35087.3258029164. The cubic root of 1231120432 is about 1071.7665035000.

Adding to 1231120432 its reverse (2340211321), we get a palindrome (3571331753).

The spelling of 1231120432 in words is "one billion, two hundred thirty-one million, one hundred twenty thousand, four hundred thirty-two".