1321318288 has 10 divisors (see below), whose sum is σ = 2560054214. Its totient is φ = 660659136.

The previous prime is 1321318279. The next prime is 1321318291. The reversal of 1321318288 is 8828131231.

It can be written as a sum of positive squares in only one way, i.e., 1272206224 + 49112064 = 35668^2 + 7008^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41291181 + ... + 41291212.

Almost surely, 2^1321318288 is an apocalyptic number.

It is an amenable number.

1321318288 is a deficient number, since it is larger than the sum of its proper divisors (1238735926).

1321318288 is an equidigital number, since it uses as much as digits as its factorization.

1321318288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82582401 (or 82582395 counting only the distinct ones).

The product of its digits is 18432, while the sum is 37.

The square root of 1321318288 is about 36349.9420632276. The cubic root of 1321318288 is about 1097.3263685136.

The spelling of 1321318288 in words is "one billion, three hundred twenty-one million, three hundred eighteen thousand, two hundred eighty-eight".