1216853 has 4 divisors (see below), whose sum is σ = 1327488. Its totient is φ = 1106220.

The previous prime is 1216849. The next prime is 1216867. The reversal of 1216853 is 3586121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1216853 - 2² = 1216849 is a prime.

It is a Duffinian number.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55301 + ... + 55322.

It is an arithmetic number, because the mean of its divisors is an integer number (331872).

2^1216853 is an apocalyptic number.

It is an amenable number.

1216853 is a deficient number, since it is larger than the sum of its proper divisors (110635).

1216853 is a wasteful number, since it uses less digits than its factorization.

1216853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110634.

The product of its digits is 1440, while the sum is 26.

The square root of 1216853 is about 1103.1106018890. The cubic root of 1216853 is about 106.7610178632.

It can be divided in two parts, 12168 and 53, that added together give a palindrome (12221).

The spelling of 1216853 in words is "one million, two hundred sixteen thousand, eight hundred fifty-three".