1216894 has 16 divisors (see below), whose sum is σ = 2209248. Its totient is φ = 490752.

The previous prime is 1216879. The next prime is 1216903. The reversal of 1216894 is 4986121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2319 + ... + 2794.

It is an arithmetic number, because the mean of its divisors is an integer number (138078).

2^1216894 is an apocalyptic number.

1216894 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1216894 is a deficient number, since it is larger than the sum of its proper divisors (992354).

1216894 is a wasteful number, since it uses less digits than its factorization.

1216894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5139.

The product of its digits is 3456, while the sum is 31.

The square root of 1216894 is about 1103.1291855445. The cubic root of 1216894 is about 106.7622168995.

The spelling of 1216894 in words is "one million, two hundred sixteen thousand, eight hundred ninety-four".