1221676316 has 24 divisors (see below), whose sum is σ = 2476827360. Its totient is φ = 516402432.

The previous prime is 1221676279. The next prime is 1221676319. The reversal of 1221676316 is 6136761221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221676319) by changing a digit.

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, 296801 + ... + 300888.

It is an arithmetic number, because the mean of its divisors is an integer number (103201140).

Almost surely, 2^1221676316 is an apocalyptic number.

It is an amenable number.

1221676316 is an abundant number, since it is smaller than the sum of its proper divisors (1255151044).

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

1221676316 is a wasteful number, since it uses less digits than its factorization.

1221676316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597773 (or 597771 counting only the distinct ones).

The product of its digits is 18144, while the sum is 35.

The square root of 1221676316 is about 34952.4865496004. The cubic root of 1221676316 is about 1069.0189032977.

The spelling of 1221676316 in words is "one billion, two hundred twenty-one million, six hundred seventy-six thousand, three hundred sixteen".