1216893 has 16 divisors (see below), whose sum is σ = 1757120. Its totient is φ = 746496.

The previous prime is 1216879. The next prime is 1216903. The reversal of 1216893 is 3986121.

It is not a de Polignac number, because 1216893 - 2¹⁴ = 1200509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1216893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216823) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1821 + ... + 2397.

It is an arithmetic number, because the mean of its divisors is an integer number (109820).

2^1216893 is an apocalyptic number.

It is an amenable number.

1216893 is a deficient number, since it is larger than the sum of its proper divisors (540227).

1216893 is a wasteful number, since it uses less digits than its factorization.

1216893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636.

The product of its digits is 2592, while the sum is 30.

The square root of 1216893 is about 1103.1287322883. The cubic root of 1216893 is about 106.7621876550.

The spelling of 1216893 in words is "one million, two hundred sixteen thousand, eight hundred ninety-three".