1312320 has 56 divisors (see below), whose sum is σ = 4169664. Its totient is φ = 349696.

The previous prime is 1312319. The next prime is 1312331. The reversal of 1312320 is 232131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1312296 and 1312305.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 277 + ... + 1643.

2^1312320 is an apocalyptic number.

1312320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1312320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2084832).

1312320 is an abundant number, since it is smaller than the sum of its proper divisors (2857344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1312320 is a wasteful number, since it uses less digits than its factorization.

1312320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387 (or 1377 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 1312320 is about 1145.5653626049. The cubic root of 1312320 is about 109.4829731036.

Adding to 1312320 its reverse (232131), we get a palindrome (1544451).

The spelling of 1312320 in words is "one million, three hundred twelve thousand, three hundred twenty".