1321361156 has 24 divisors (see below), whose sum is σ = 2442058080. Its totient is φ = 623858112.

The previous prime is 1321361123. The next prime is 1321361177. The reversal of 1321361156 is 6511631231.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4985 + ... + 51648.

It is an arithmetic number, because the mean of its divisors is an integer number (101752420).

Almost surely, 2^1321361156 is an apocalyptic number.

It is an amenable number.

1321361156 is a deficient number, since it is larger than the sum of its proper divisors (1120696924).

1321361156 is a wasteful number, since it uses less digits than its factorization.

1321361156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56963 (or 56961 counting only the distinct ones).

The product of its digits is 3240, while the sum is 29.

The square root of 1321361156 is about 36350.5317155059. The cubic root of 1321361156 is about 1097.3382353687.

Adding to 1321361156 its reverse (6511631231), we get a palindrome (7832992387).

The spelling of 1321361156 in words is "one billion, three hundred twenty-one million, three hundred sixty-one thousand, one hundred fifty-six".