1317664 has 12 divisors (see below), whose sum is σ = 2594214. Its totient is φ = 658816.

The previous prime is 1317629. The next prime is 1317671. The reversal of 1317664 is 4667131.

It can be written as a sum of positive squares in only one way, i.e., 1227664 + 90000 = 1108^2 + 300^2 .

It is a super-3 number, since 3×1317664³ = 6863336572082552832, which contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20557 + ... + 20620.

2^1317664 is an apocalyptic number.

It is an amenable number.

1317664 is a deficient number, since it is larger than the sum of its proper divisors (1276550).

1317664 is an equidigital number, since it uses as much as digits as its factorization.

1317664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41187 (or 41179 counting only the distinct ones).

The product of its digits is 3024, while the sum is 28.

The square root of 1317664 is about 1147.8954656239. The cubic root of 1317664 is about 109.6313832020.

The spelling of 1317664 in words is "one million, three hundred seventeen thousand, six hundred sixty-four".