1216004 has 12 divisors (see below), whose sum is σ = 2148300. Its totient is φ = 602208.

The previous prime is 1215923. The next prime is 1216009. The reversal of 1216004 is 4006121.

It can be written as a sum of positive squares in 2 ways, for example, as 806404 + 409600 = 898^2 + 640^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1216004.

It is not an unprimeable number, because it can be changed into a prime (1216009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 959 + ... + 1830.

It is an arithmetic number, because the mean of its divisors is an integer number (179025).

2^1216004 is an apocalyptic number.

It is an amenable number.

1216004 is a deficient number, since it is larger than the sum of its proper divisors (932296).

1216004 is a wasteful number, since it uses less digits than its factorization.

1216004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2902 (or 2900 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1216004 is about 1102.7257138564. The cubic root of 1216004 is about 106.7361829839.

The spelling of 1216004 in words is "one million, two hundred sixteen thousand, four".