321432012 has 36 divisors (see below), whose sum is σ = 886374216. Its totient is φ = 97403520.

The previous prime is 321431993. The next prime is 321432017. The reversal of 321432012 is 210234123.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (321432017) 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 11 ways as a sum of consecutive naturals, for example, 405453 + ... + 406244.

It is an arithmetic number, because the mean of its divisors is an integer number (24621506).

Almost surely, 2^321432012 is an apocalyptic number.

It is an amenable number.

321432012 is an abundant number, since it is smaller than the sum of its proper divisors (564942204).

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

321432012 is a wasteful number, since it uses less digits than its factorization.

321432012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811718 (or 811713 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 321432012 is about 17928.5250927119. The cubic root of 321432012 is about 685.0091546897.

Adding to 321432012 its reverse (210234123), we get a palindrome (531666135).

The spelling of 321432012 in words is "three hundred twenty-one million, four hundred thirty-two thousand, twelve".