1317216 has 24 divisors (see below), whose sum is σ = 3457944. Its totient is φ = 439040.

The previous prime is 1317193. The next prime is 1317223. The reversal of 1317216 is 6127131.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 1317192 and 1317201.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 6765 + ... + 6956.

It is an arithmetic number, because the mean of its divisors is an integer number (144081).

2^1317216 is an apocalyptic number.

1317216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1317216 is an abundant number, since it is smaller than the sum of its proper divisors (2140728).

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

1317216 is a wasteful number, since it uses less digits than its factorization.

1317216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13734 (or 13726 counting only the distinct ones).

The product of its digits is 252, while the sum is 21.

The square root of 1317216 is about 1147.7003093142. The cubic root of 1317216 is about 109.6189570633.

The spelling of 1317216 in words is "one million, three hundred seventeen thousand, two hundred sixteen".