1216364 has 6 divisors (see below), whose sum is σ = 2128644. Its totient is φ = 608180.

The previous prime is 1216351. The next prime is 1216373. The reversal of 1216364 is 4636121.

It is a happy 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 as a sum of consecutive naturals, namely, 152042 + ... + 152049.

It is an arithmetic number, because the mean of its divisors is an integer number (354774).

2^1216364 is an apocalyptic number.

It is an amenable number.

1216364 is a deficient number, since it is larger than the sum of its proper divisors (912280).

1216364 is a wasteful number, since it uses less digits than its factorization.

1216364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304095 (or 304093 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

The square root of 1216364 is about 1102.8889336647. Note that the first 3 decimals coincide. The cubic root of 1216364 is about 106.7467150859.

The spelling of 1216364 in words is "one million, two hundred sixteen thousand, three hundred sixty-four".