1216636 has 12 divisors (see below), whose sum is σ = 2150512. Its totient is φ = 602208.

The previous prime is 1216619. The next prime is 1216681. The reversal of 1216636 is 6366121.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1216636.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1065 + ... + 1888.

2^1216636 is an apocalyptic number.

It is an amenable number.

1216636 is a deficient number, since it is larger than the sum of its proper divisors (933876).

1216636 is a wasteful number, since it uses less digits than its factorization.

1216636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3060 (or 3058 counting only the distinct ones).

The product of its digits is 1296, while the sum is 25.

The square root of 1216636 is about 1103.0122392793. The cubic root of 1216636 is about 106.7546712960.

The spelling of 1216636 in words is "one million, two hundred sixteen thousand, six hundred thirty-six".