12456990 has 160 divisors (see below), whose sum is σ = 41469120. Its totient is φ = 2628288.

The previous prime is 12456943. The next prime is 12456991. The reversal of 12456990 is 9965421.

12456990 is a `hidden beast` number, since 1 + 2 + 4 + 569 + 90 = 666.

12456990 is digitally balanced in base 2, base 4 and base 8, because in such bases it contains all the possibile digits an equal number of times.

12456990 is strictly pandigital in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12456991) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 958224 + ... + 958236.

It is an arithmetic number, because the mean of its divisors is an integer number (259182).

Almost surely, 2^12456990 is an apocalyptic number.

12456990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12456990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20734560).

12456990 is an abundant number, since it is smaller than the sum of its proper divisors (29012130).

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

12456990 is an equidigital number, since it uses as much as digits as its factorization.

12456990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65 (or 30 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 12456990 is about 3529.4461321856. The cubic root of 12456990 is about 231.8129561578.

The spelling of 12456990 in words is "twelve million, four hundred fifty-six thousand, nine hundred ninety".