1225643604 has 48 divisors (see below), whose sum is σ = 2915808000. Its totient is φ = 400622976.

The previous prime is 1225643593. The next prime is 1225643641. The reversal of 1225643604 is 4063465221.

It is a super-2 number, since 2×1225643604² = 3004404488052217632, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136914 + ... + 145590.

It is an arithmetic number, because the mean of its divisors is an integer number (60746000).

Almost surely, 2^1225643604 is an apocalyptic number.

It is an amenable number.

1225643604 is an abundant number, since it is smaller than the sum of its proper divisors (1690164396).

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

1225643604 is a wasteful number, since it uses less digits than its factorization.

1225643604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8912 (or 8910 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 1225643604 is about 35009.1931355180. The cubic root of 1225643604 is about 1070.1748350289.

The spelling of 1225643604 in words is "one billion, two hundred twenty-five million, six hundred forty-three thousand, six hundred four".