1316521732 has 12 divisors (see below), whose sum is σ = 2304183196. Its totient is φ = 658183680.

The previous prime is 1316521727. The next prime is 1316521757. The reversal of 1316521732 is 2371256131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 920272896 + 396248836 = 30336^2 + 19906^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1316521694 and 1316521703.

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 3 ways as a sum of consecutive naturals, for example, 37948 + ... + 63820.

Almost surely, 2^1316521732 is an apocalyptic number.

It is an amenable number.

1316521732 is a deficient number, since it is larger than the sum of its proper divisors (987661464).

1316521732 is a wasteful number, since it uses less digits than its factorization.

1316521732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38598 (or 38596 counting only the distinct ones).

The product of its digits is 7560, while the sum is 31.

The square root of 1316521732 is about 36283.9045859180. The cubic root of 1316521732 is about 1095.9969464191.

Adding to 1316521732 its reverse (2371256131), we get a palindrome (3687777863).

The spelling of 1316521732 in words is "one billion, three hundred sixteen million, five hundred twenty-one thousand, seven hundred thirty-two".