12159720 has 128 divisors (see below), whose sum is σ = 41328000. Its totient is φ = 3219264.

The previous prime is 12159703. The next prime is 12159731. The reversal of 12159720 is 2795121.

12159720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87411 + ... + 87549.

It is an arithmetic number, because the mean of its divisors is an integer number (322875).

It is a vampire number, since it can be written as 1251 ⋅ 9720 (with its own digits).

Almost surely, 2^12159720 is an apocalyptic number.

12159720 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 12159720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20664000).

12159720 is an abundant number, since it is smaller than the sum of its proper divisors (29168280).

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

12159720 is an equidigital number, since it uses as much as digits as its factorization.

12159720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 12159720 is about 3487.0790068480. The cubic root of 12159720 is about 229.9541181320.

The spelling of 12159720 in words is "twelve million, one hundred fifty-nine thousand, seven hundred twenty".