12129620 has 24 divisors (see below), whose sum is σ = 25782624. Its totient is φ = 4792736.

The previous prime is 12129617. The next prime is 12129659. The reversal of 12129620 is 2692121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1994 + ... + 5313.

It is an arithmetic number, because the mean of its divisors is an integer number (1074276).

Almost surely, 2^12129620 is an apocalyptic number.

12129620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12129620 is an abundant number, since it is smaller than the sum of its proper divisors (13653004).

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

12129620 is a wasteful number, since it uses less digits than its factorization.

12129620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7399 (or 7397 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 12129620 is about 3482.7603994533. The cubic root of 12129620 is about 229.7642196242.

The spelling of 12129620 in words is "twelve million, one hundred twenty-nine thousand, six hundred twenty".