1216680 has 32 divisors (see below), whose sum is σ = 3650400. Its totient is φ = 324416.

The previous prime is 1216619. The next prime is 1216681. The reversal of 1216680 is 866121.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1216680.

It is not an unprimeable number, because it can be changed into a prime (1216681) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4950 + ... + 5189.

It is an arithmetic number, because the mean of its divisors is an integer number (114075).

2^1216680 is an apocalyptic number.

1216680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1216680 is an abundant number, since it is smaller than the sum of its proper divisors (2433720).

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

1216680 is a wasteful number, since it uses less digits than its factorization.

1216680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10153 (or 10149 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 1216680 is about 1103.0321844806. The cubic root of 1216680 is about 106.7559582186.

It can be divided in two parts, 12166 and 80, that added together give a triangular number (12246 = T₁₅₆).

The spelling of 1216680 in words is "one million, two hundred sixteen thousand, six hundred eighty".