12129860 has 12 divisors (see below), whose sum is σ = 25472748. Its totient is φ = 4851936.

The previous prime is 12129851. The next prime is 12129863. The reversal of 12129860 is 6892121.

It can be written as a sum of positive squares in 2 ways, for example, as 3474496 + 8655364 = 1864^2 + 2942^2 .

It is not an unprimeable number, because it can be changed into a prime (12129863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303227 + ... + 303266.

It is an arithmetic number, because the mean of its divisors is an integer number (2122729).

Almost surely, 2^12129860 is an apocalyptic number.

12129860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12129860 is an abundant number, since it is smaller than the sum of its proper divisors (13342888).

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

12129860 is a wasteful number, since it uses less digits than its factorization.

12129860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606502 (or 606500 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 12129860 is about 3482.7948547108. The cubic root of 12129860 is about 229.7657350069.

The spelling of 12129860 in words is "twelve million, one hundred twenty-nine thousand, eight hundred sixty".