1225574856 has 96 divisors (see below), whose sum is σ = 3661912800. Its totient is φ = 367192320.

The previous prime is 1225574827. The next prime is 1225574869. The reversal of 1225574856 is 6584755221.

1225574856 is a `hidden beast` number, since 1 + 2 + 2 + 557 + 48 + 56 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61795 + ... + 79181.

It is an arithmetic number, because the mean of its divisors is an integer number (38144925).

Almost surely, 2^1225574856 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 1225574856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1830956400).

1225574856 is an abundant number, since it is smaller than the sum of its proper divisors (2436337944).

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

1225574856 is a wasteful number, since it uses less digits than its factorization.

1225574856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17499 (or 17492 counting only the distinct ones).

The product of its digits is 672000, while the sum is 45.

The square root of 1225574856 is about 35008.2112653589. The cubic root of 1225574856 is about 1070.1548254723.

It can be divided in two parts, 1225 and 574856, that added together give a square (576081 = 759²).

The spelling of 1225574856 in words is "one billion, two hundred twenty-five million, five hundred seventy-four thousand, eight hundred fifty-six".