1213971416 has 16 divisors (see below), whose sum is σ = 2601367440. Its totient is φ = 520273440.

The previous prime is 1213971403. The next prime is 1213971449. The reversal of 1213971416 is 6141793121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10838975 + ... + 10839086.

It is an arithmetic number, because the mean of its divisors is an integer number (162585465).

Almost surely, 2^1213971416 is an apocalyptic number.

It is an amenable number.

1213971416 is an abundant number, since it is smaller than the sum of its proper divisors (1387396024).

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

1213971416 is a wasteful number, since it uses less digits than its factorization.

1213971416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21678074 (or 21678070 counting only the distinct ones).

The product of its digits is 9072, while the sum is 35.

The square root of 1213971416 is about 34842.0925892806. The cubic root of 1213971416 is about 1066.7667899939.

The spelling of 1213971416 in words is "one billion, two hundred thirteen million, nine hundred seventy-one thousand, four hundred sixteen".