1222604156 has 12 divisors (see below), whose sum is σ = 2213335320. Its totient is φ = 590222640.

The previous prime is 1222604143. The next prime is 1222604171. The reversal of 1222604156 is 6514062221.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5269730 + ... + 5269961.

It is an arithmetic number, because the mean of its divisors is an integer number (184444610).

Almost surely, 2^1222604156 is an apocalyptic number.

It is an amenable number.

1222604156 is a deficient number, since it is larger than the sum of its proper divisors (990731164).

1222604156 is a wasteful number, since it uses less digits than its factorization.

1222604156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10539724 (or 10539722 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 1222604156 is about 34965.7569058643. The cubic root of 1222604156 is about 1069.2894680094.

Adding to 1222604156 its reverse (6514062221), we get a palindrome (7736666377).

The spelling of 1222604156 in words is "one billion, two hundred twenty-two million, six hundred four thousand, one hundred fifty-six".