12456780 has 144 divisors (see below), whose sum is σ = 42900480. Its totient is φ = 2685312.

The previous prime is 12456751. The next prime is 12456791. The reversal of 12456780 is 8765421.

12456780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55749 + ... + 55971.

It is an arithmetic number, because the mean of its divisors is an integer number (297920).

Almost surely, 2^12456780 is an apocalyptic number.

12456780 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 12456780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21450240).

12456780 is an abundant number, since it is smaller than the sum of its proper divisors (30443700).

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

12456780 is a wasteful number, since it uses less digits than its factorization.

12456780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268 (or 259 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 12456780 is about 3529.4163823499. The cubic root of 12456780 is about 231.8116535158.

The spelling of 12456780 in words is "twelve million, four hundred fifty-six thousand, seven hundred eighty".