1216126852 has 12 divisors (see below), whose sum is σ = 2129580880. Its totient is φ = 607675176.

The previous prime is 1216126811. The next prime is 1216126853. The reversal of 1216126852 is 2586216121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1216126853) 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, 89958 + ... + 102589.

Almost surely, 2^1216126852 is an apocalyptic number.

It is an amenable number.

1216126852 is a deficient number, since it is larger than the sum of its proper divisors (913454028).

1216126852 is a wasteful number, since it uses less digits than its factorization.

1216126852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194130 (or 194128 counting only the distinct ones).

The product of its digits is 11520, while the sum is 34.

The square root of 1216126852 is about 34873.0103661843. The cubic root of 1216126852 is about 1067.3977735585.

The spelling of 1216126852 in words is "one billion, two hundred sixteen million, one hundred twenty-six thousand, eight hundred fifty-two".