1216653124 has 24 divisors (see below), whose sum is σ = 2203934040. Its totient is φ = 586983936.

The previous prime is 1216653083. The next prime is 1216653133. The reversal of 1216653124 is 4213566121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 22259524 + 1194393600 = 4718^2 + 34560^2 .

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, 327244 + ... + 330940.

It is an arithmetic number, because the mean of its divisors is an integer number (91830585).

Almost surely, 2^1216653124 is an apocalyptic number.

It is an amenable number.

1216653124 is a deficient number, since it is larger than the sum of its proper divisors (987280916).

1216653124 is a wasteful number, since it uses less digits than its factorization.

1216653124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6567 (or 6565 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 1216653124 is about 34880.5550987939. Note that the first 3 decimals coincide. The cubic root of 1216653124 is about 1067.5517214655.

The spelling of 1216653124 in words is "one billion, two hundred sixteen million, six hundred fifty-three thousand, one hundred twenty-four".