1321423432 has 32 divisors (see below), whose sum is σ = 2844014400. Its totient is φ = 563845824.

The previous prime is 1321423429. The next prime is 1321423487. The reversal of 1321423432 is 2343241231.

It is a junction number, because it is equal to n+sod(n) for n = 1321423397 and 1321423406.

It is an unprimeable number.

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, 38698 + ... + 64345.

It is an arithmetic number, because the mean of its divisors is an integer number (88875450).

Almost surely, 2^1321423432 is an apocalyptic number.

It is an amenable number.

1321423432 is an abundant number, since it is smaller than the sum of its proper divisors (1522590968).

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

1321423432 is a wasteful number, since it uses less digits than its factorization.

1321423432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103285 (or 103281 counting only the distinct ones).

The product of its digits is 3456, while the sum is 25.

The square root of 1321423432 is about 36351.3883091141. The cubic root of 1321423432 is about 1097.3554743504.

Adding to 1321423432 its reverse (2343241231), we get a palindrome (3664664663).

The spelling of 1321423432 in words is "one billion, three hundred twenty-one million, four hundred twenty-three thousand, four hundred thirty-two".