1317872 has 20 divisors (see below), whose sum is σ = 2636736. Its totient is φ = 637440.

The previous prime is 1317853. The next prime is 1317881. The reversal of 1317872 is 2787131.

1317872 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 833 + ... + 1824.

2^1317872 is an apocalyptic number.

It is an amenable number.

1317872 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.

1317872 is a wasteful number, since it uses less digits than its factorization.

1317872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2696 (or 2690 counting only the distinct ones).

The product of its digits is 2352, while the sum is 29.

The square root of 1317872 is about 1147.9860626332. The cubic root of 1317872 is about 109.6371515233.

The spelling of 1317872 in words is "one million, three hundred seventeen thousand, eight hundred seventy-two".