1321480737 has 20 divisors (see below), whose sum is σ = 2090187396. Its totient is φ = 829163520.

The previous prime is 1321480711. The next prime is 1321480751. The reversal of 1321480737 is 7370841231.

It can be written as a sum of positive squares in 2 ways, for example, as 1070860176 + 250620561 = 32724^2 + 15831^2 .

It is not a de Polignac number, because 1321480737 - 2⁶ = 1321480673 is a prime.

It is a super-2 number, since 2×1321480737² = 3492622676524126338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1321480757) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 478464 + ... + 481217.

Almost surely, 2^1321480737 is an apocalyptic number.

1321480737 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1321480737 is a deficient number, since it is larger than the sum of its proper divisors (768706659).

1321480737 is an equidigital number, since it uses as much as digits as its factorization.

1321480737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959710 (or 959701 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 1321480737 is about 36352.1765098047. The cubic root of 1321480737 is about 1097.3713368022.

The spelling of 1321480737 in words is "one billion, three hundred twenty-one million, four hundred eighty thousand, seven hundred thirty-seven".