1212413656 has 16 divisors (see below), whose sum is σ = 2311806600. Its totient is φ = 595931904.

The previous prime is 1212413641. The next prime is 1212413659. The reversal of 1212413656 is 6563142121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212413659) 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, 1283865 + ... + 1284808.

Almost surely, 2^1212413656 is an apocalyptic number.

It is an amenable number.

1212413656 is a deficient number, since it is larger than the sum of its proper divisors (1099392944).

1212413656 is a wasteful number, since it uses less digits than its factorization.

1212413656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2568738 (or 2568734 counting only the distinct ones).

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

The square root of 1212413656 is about 34819.7308433020. The cubic root of 1212413656 is about 1066.3103053493.

Adding to 1212413656 its reverse (6563142121), we get a palindrome (7775555777).

The spelling of 1212413656 in words is "one billion, two hundred twelve million, four hundred thirteen thousand, six hundred fifty-six".