1216216 has 8 divisors (see below), whose sum is σ = 2280420. Its totient is φ = 608104.

The previous prime is 1216213. The next prime is 1216249. The reversal of 1216216 is 6126121.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1216193 and 1216202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76006 + ... + 76021.

2^1216216 is an apocalyptic number.

It is an amenable number.

1216216 is a deficient number, since it is larger than the sum of its proper divisors (1064204).

1216216 is a wasteful number, since it uses less digits than its factorization.

1216216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152033 (or 152029 counting only the distinct ones).

The product of its digits is 144, while the sum is 19.

The square root of 1216216 is about 1102.8218351121. The cubic root of 1216216 is about 106.7423854734.

The spelling of 1216216 in words is "one million, two hundred sixteen thousand, two hundred sixteen".