1317992 has 64 divisors (see below), whose sum is σ = 3024000. Its totient is φ = 532224.

The previous prime is 1317989. The next prime is 1318003. The reversal of 1317992 is 2997131.

It is a happy number.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45434 + ... + 45462.

It is an arithmetic number, because the mean of its divisors is an integer number (47250).

2^1317992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1317992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1512000).

1317992 is an abundant number, since it is smaller than the sum of its proper divisors (1706008).

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

1317992 is a wasteful number, since it uses less digits than its factorization.

1317992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 86 counting only the distinct ones).

The product of its digits is 3402, while the sum is 32.

The square root of 1317992 is about 1148.0383268863. The cubic root of 1317992 is about 109.6404791249.

The spelling of 1317992 in words is "one million, three hundred seventeen thousand, nine hundred ninety-two".