1225080556 has 72 divisors (see below), whose sum is σ = 2739502080. Its totient is φ = 475741728.

The previous prime is 1225080541. The next prime is 1225080569. The reversal of 1225080556 is 6550805221.

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, 78501 + ... + 92803.

It is an arithmetic number, because the mean of its divisors is an integer number (38048640).

Almost surely, 2^1225080556 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 1225080556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1369751040).

1225080556 is an abundant number, since it is smaller than the sum of its proper divisors (1514421524).

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

1225080556 is a wasteful number, since it uses less digits than its factorization.

1225080556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14363 (or 14354 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 34.

The square root of 1225080556 is about 35001.1507810815. The cubic root of 1225080556 is about 1070.0109341766.

Adding to 1225080556 its reverse (6550805221), we get a palindrome (7775885777).

The spelling of 1225080556 in words is "one billion, two hundred twenty-five million, eighty thousand, five hundred fifty-six".