1231235432 has 32 divisors (see below), whose sum is σ = 2723473920. Its totient is φ = 510649920.

The previous prime is 1231235417. The next prime is 1231235437. The reversal of 1231235432 is 2345321321.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1231235437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352883 + ... + 356354.

It is an arithmetic number, because the mean of its divisors is an integer number (85108560).

Almost surely, 2^1231235432 is an apocalyptic number.

It is an amenable number.

1231235432 is an abundant number, since it is smaller than the sum of its proper divisors (1492238488).

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

1231235432 is a wasteful number, since it uses less digits than its factorization.

1231235432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709281 (or 709277 counting only the distinct ones).

The product of its digits is 4320, while the sum is 26.

The square root of 1231235432 is about 35088.9645330266. The cubic root of 1231235432 is about 1071.7998739993.

Adding to 1231235432 its reverse (2345321321), we get a palindrome (3576556753).

The spelling of 1231235432 in words is "one billion, two hundred thirty-one million, two hundred thirty-five thousand, four hundred thirty-two".