12191520 has 96 divisors (see below), whose sum is σ = 41912640. Its totient is φ = 2954240.

The previous prime is 12191507. The next prime is 12191563. The reversal of 12191520 is 2519121.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4126 + ... + 6434.

It is an arithmetic number, because the mean of its divisors is an integer number (436590).

Almost surely, 2^12191520 is an apocalyptic number.

12191520 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 12191520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20956320).

12191520 is an abundant number, since it is smaller than the sum of its proper divisors (29721120).

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

12191520 is a wasteful number, since it uses less digits than its factorization.

12191520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2338 (or 2330 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 12191520 is about 3491.6357198310. The cubic root of 12191520 is about 230.1544016812.

The spelling of 12191520 in words is "twelve million, one hundred ninety-one thousand, five hundred twenty".