12186420 has 48 divisors (see below), whose sum is σ = 34328448. Its totient is φ = 3230080.

The previous prime is 12186413. The next prime is 12186437. The reversal of 12186420 is 2468121.

It is a congruent number.

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, 11305 + ... + 12335.

It is an arithmetic number, because the mean of its divisors is an integer number (715176).

Almost surely, 2^12186420 is an apocalyptic number.

12186420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12186420 is an abundant number, since it is smaller than the sum of its proper divisors (22142028).

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

12186420 is a wasteful number, since it uses less digits than its factorization.

12186420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240 (or 1238 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 12186420 is about 3490.9053267025. The cubic root of 12186420 is about 230.1223042025.

The spelling of 12186420 in words is "twelve million, one hundred eighty-six thousand, four hundred twenty".