1221676604 has 6 divisors (see below), whose sum is σ = 2137934064. Its totient is φ = 610838300.

The previous prime is 1221676543. The next prime is 1221676607. The reversal of 1221676604 is 4066761221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221676607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152709572 + ... + 152709579.

It is an arithmetic number, because the mean of its divisors is an integer number (356322344).

Almost surely, 2^1221676604 is an apocalyptic number.

It is an amenable number.

1221676604 is a deficient number, since it is larger than the sum of its proper divisors (916257460).

1221676604 is a wasteful number, since it uses less digits than its factorization.

1221676604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305419155 (or 305419153 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 1221676604 is about 34952.4906694788. The cubic root of 1221676604 is about 1069.0189873018.

The spelling of 1221676604 in words is "one billion, two hundred twenty-one million, six hundred seventy-six thousand, six hundred four".