1216971246 has 16 divisors (see below), whose sum is σ = 2442732624. Its totient is φ = 404192064.

The previous prime is 1216971227. The next prime is 1216971253. The reversal of 1216971246 is 6421796121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364455 + ... + 367778.

It is an arithmetic number, because the mean of its divisors is an integer number (152670789).

Almost surely, 2^1216971246 is an apocalyptic number.

1216971246 is an abundant number, since it is smaller than the sum of its proper divisors (1225761378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1216971246 is a wasteful number, since it uses less digits than its factorization.

1216971246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732515.

The product of its digits is 36288, while the sum is 39.

The square root of 1216971246 is about 34885.1149632619. The cubic root of 1216971246 is about 1067.6447586910.

The spelling of 1216971246 in words is "one billion, two hundred sixteen million, nine hundred seventy-one thousand, two hundred forty-six".