1224201604 has 6 divisors (see below), whose sum is σ = 2142352814. Its totient is φ = 612100800.

The previous prime is 1224201599. The next prime is 1224201613. The reversal of 1224201604 is 4061024221.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 883872900 + 340328704 = 29730^2 + 18448^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153025197 + ... + 153025204.

Almost surely, 2^1224201604 is an apocalyptic number.

It is an amenable number.

1224201604 is a deficient number, since it is larger than the sum of its proper divisors (918151210).

1224201604 is a wasteful number, since it uses less digits than its factorization.

1224201604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306050405 (or 306050403 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 1224201604 is about 34988.5924838368. The cubic root of 1224201604 is about 1069.7549746105.

Adding to 1224201604 its reverse (4061024221), we get a palindrome (5285225825).

The spelling of 1224201604 in words is "one billion, two hundred twenty-four million, two hundred one thousand, six hundred four".