1216856 has 16 divisors (see below), whose sum is σ = 2343840. Its totient is φ = 591840.

The previous prime is 1216849. The next prime is 1216867. The reversal of 1216856 is 6586121.

It is a happy number.

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, 1760 + ... + 2351.

It is an arithmetic number, because the mean of its divisors is an integer number (146490).

2^1216856 is an apocalyptic number.

It is an amenable number.

1216856 is a deficient number, since it is larger than the sum of its proper divisors (1126984).

1216856 is a wasteful number, since it uses less digits than its factorization.

1216856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4154 (or 4150 counting only the distinct ones).

The product of its digits is 2880, while the sum is 29.

The square root of 1216856 is about 1103.1119616793. Note that the first 3 decimals coincide. The cubic root of 1216856 is about 106.7611055985.

The spelling of 1216856 in words is "one million, two hundred sixteen thousand, eight hundred fifty-six".