12609920 has 128 divisors (see below), whose sum is σ = 34149600. Its totient is φ = 4423680.

The previous prime is 12609917. The next prime is 12609931. The reversal of 12609920 is 2990621.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206690 + ... + 206750.

Almost surely, 2^12609920 is an apocalyptic number.

12609920 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 12609920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17074800).

12609920 is an abundant number, since it is smaller than the sum of its proper divisors (21539680).

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

12609920 is a wasteful number, since it uses less digits than its factorization.

12609920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 12609920 is about 3551.0449166407. The cubic root of 12609920 is about 232.7577286136.

The spelling of 12609920 in words is "twelve million, six hundred nine thousand, nine hundred twenty".