1387312 has 20 divisors (see below), whose sum is σ = 2775616. Its totient is φ = 671040.

The previous prime is 1387289. The next prime is 1387313. The reversal of 1387312 is 2137831.

1387312 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1387313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 903 + ... + 1894.

2^1387312 is an apocalyptic number.

It is an amenable number.

1387312 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1387312 is a wasteful number, since it uses less digits than its factorization.

1387312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2836 (or 2830 counting only the distinct ones).

The product of its digits is 1008, while the sum is 25.

The square root of 1387312 is about 1177.8420946799. The cubic root of 1387312 is about 111.5299175016.

The spelling of 1387312 in words is "one million, three hundred eighty-seven thousand, three hundred twelve".