1312928 has 24 divisors (see below), whose sum is σ = 2619540. Its totient is φ = 647680.

The previous prime is 1312921. The next prime is 1312931. The reversal of 1312928 is 8292131.

It can be written as a sum of positive squares in 2 ways, for example, as 1227664 + 85264 = 1108^2 + 292^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1312897 and 1312906.

It is not an unprimeable number, because it can be changed into a prime (1312921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2618 + ... + 3078.

2^1312928 is an apocalyptic number.

It is an amenable number.

1312928 is a deficient number, since it is larger than the sum of its proper divisors (1306612).

1312928 is an equidigital number, since it uses as much as digits as its factorization.

1312928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560 (or 552 counting only the distinct ones).

The product of its digits is 864, while the sum is 26.

The square root of 1312928 is about 1145.8307030273. The cubic root of 1312928 is about 109.4998783733.

The spelling of 1312928 in words is "one million, three hundred twelve thousand, nine hundred twenty-eight".