12159990 has 64 divisors (see below), whose sum is σ = 33566400. Its totient is φ = 3128832.

The previous prime is 12159989. The next prime is 12159991. The reversal of 12159990 is 9995121.

It is an interprime number because it is at equal distance from previous prime (12159989) and next prime (12159991).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12159991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7054 + ... + 8606.

It is an arithmetic number, because the mean of its divisors is an integer number (524475).

Almost surely, 2^12159990 is an apocalyptic number.

12159990 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 12159990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16783200).

12159990 is an abundant number, since it is smaller than the sum of its proper divisors (21406410).

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

12159990 is a wasteful number, since it uses less digits than its factorization.

12159990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1598 (or 1592 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 36.

The square root of 12159990 is about 3487.1177209839. The cubic root of 12159990 is about 229.9558201216.

The spelling of 12159990 in words is "twelve million, one hundred fifty-nine thousand, nine hundred ninety".