1317996 has 36 divisors (see below), whose sum is σ = 3441984. Its totient is φ = 424800.

The previous prime is 1317989. The next prime is 1318003. The reversal of 1317996 is 6997131.

1317996 = 191² + 192² + ... + 221².

It is an interprime number because it is at equal distance from previous prime (1317989) and next prime (1318003).

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1317996² = 3474226912032, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1317996.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 526 + ... + 1706.

2^1317996 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 1317996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1720992).

1317996 is an abundant number, since it is smaller than the sum of its proper divisors (2123988).

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

1317996 is a wasteful number, since it uses less digits than its factorization.

1317996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222 (or 1217 counting only the distinct ones).

The product of its digits is 10206, while the sum is 36.

The square root of 1317996 is about 1148.0400689871. The cubic root of 1317996 is about 109.6405900415.

The spelling of 1317996 in words is "one million, three hundred seventeen thousand, nine hundred ninety-six".