1225123564 has 48 divisors (see below), whose sum is σ = 2601607680. Its totient is φ = 492791040.

The previous prime is 1225123519. The next prime is 1225123579. The reversal of 1225123564 is 4653215221.

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, 177009 + ... + 183799.

It is an arithmetic number, because the mean of its divisors is an integer number (54200160).

Almost surely, 2^1225123564 is an apocalyptic number.

1225123564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1225123564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1300803840).

1225123564 is an abundant number, since it is smaller than the sum of its proper divisors (1376484116).

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

1225123564 is a wasteful number, since it uses less digits than its factorization.

1225123564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7198 (or 7196 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 1225123564 is about 35001.7651554889. The cubic root of 1225123564 is about 1070.0234553917.

Adding to 1225123564 its reverse (4653215221), we get a palindrome (5878338785).

The spelling of 1225123564 in words is "one billion, two hundred twenty-five million, one hundred twenty-three thousand, five hundred sixty-four".