1320431156 has 12 divisors (see below), whose sum is σ = 2520823200. Its totient is φ = 600195960.

The previous prime is 1320431129. The next prime is 1320431179. The reversal of 1320431156 is 6511340231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15004856 + ... + 15004943.

It is an arithmetic number, because the mean of its divisors is an integer number (210068600).

Almost surely, 2^1320431156 is an apocalyptic number.

It is an amenable number.

1320431156 is a deficient number, since it is larger than the sum of its proper divisors (1200392044).

1320431156 is a wasteful number, since it uses less digits than its factorization.

1320431156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30009814 (or 30009812 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1320431156 is about 36337.7373538860. The cubic root of 1320431156 is about 1097.0807321949.

Adding to 1320431156 its reverse (6511340231), we get a palindrome (7831771387).

The spelling of 1320431156 in words is "one billion, three hundred twenty million, four hundred thirty-one thousand, one hundred fifty-six".