1656216 has 24 divisors (see below), whose sum is σ = 4485780. Its totient is φ = 552048.

The previous prime is 1656209. The next prime is 1656223. The reversal of 1656216 is 6126561.

It is a happy number.

1656216 is a `hidden beast` number, since 1 + 656 + 2 + 1 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (1656209) and next prime (1656223).

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

It is a self number, because there is not a number n which added to its sum of digits gives 1656216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11430 + ... + 11573.

2^1656216 is an apocalyptic number.

It is an amenable number.

1656216 is an abundant number, since it is smaller than the sum of its proper divisors (2829564).

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

1656216 is a wasteful number, since it uses less digits than its factorization.

1656216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23015 (or 23008 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 1656216 is about 1286.9405580679. The cubic root of 1656216 is about 118.3147776675.

The spelling of 1656216 in words is "one million, six hundred fifty-six thousand, two hundred sixteen".