12225780 has 144 divisors (see below), whose sum is σ = 43889664. Its totient is φ = 2695680.

The previous prime is 12225779. The next prime is 12225823. The reversal of 12225780 is 8752221.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38904 + ... + 39216.

Almost surely, 2^12225780 is an apocalyptic number.

12225780 is a gapful number since it is divisible by the number (10) 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 12225780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21944832).

12225780 is an abundant number, since it is smaller than the sum of its proper divisors (31663884).

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

12225780 is a wasteful number, since it uses less digits than its factorization.

12225780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366 (or 361 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 12225780 is about 3496.5382880787. The cubic root of 12225780 is about 230.3697895140.

The spelling of 12225780 in words is "twelve million, two hundred twenty-five thousand, seven hundred eighty".