1204255656 has 144 divisors (see below), whose sum is σ = 3537848340. Its totient is φ = 368686080.

The previous prime is 1204255651. The next prime is 1204255691. The reversal of 1204255656 is 6565524021.

1204255656 is a `hidden beast` number, since 12 + 0 + 42 + 556 + 56 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1175804100 + 28451556 = 34290^2 + 5334^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1204255656.

It is not an unprimeable number, because it can be changed into a prime (1204255651) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9482265 + ... + 9482391.

Almost surely, 2^1204255656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1204255656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1768924170).

1204255656 is an abundant number, since it is smaller than the sum of its proper divisors (2333592684).

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

1204255656 is a wasteful number, since it uses less digits than its factorization.

1204255656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 1204255656 is about 34702.3868919704. The cubic root of 1204255656 is about 1063.9132841496.

Adding to 1204255656 its reverse (6565524021), we get a palindrome (7769779677).

The spelling of 1204255656 in words is "one billion, two hundred four million, two hundred fifty-five thousand, six hundred fifty-six".