12184420 has 12 divisors (see below), whose sum is σ = 25587324. Its totient is φ = 4873760.

The previous prime is 12184409. The next prime is 12184423. The reversal of 12184420 is 2448121.

It can be written as a sum of positive squares in 2 ways, for example, as 1790244 + 10394176 = 1338^2 + 3224^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12184391 and 12184400.

It is not an unprimeable number, because it can be changed into a prime (12184423) 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, 304591 + ... + 304630.

It is an arithmetic number, because the mean of its divisors is an integer number (2132277).

Almost surely, 2^12184420 is an apocalyptic number.

12184420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12184420 is an abundant number, since it is smaller than the sum of its proper divisors (13402904).

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

12184420 is a wasteful number, since it uses less digits than its factorization.

12184420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609230 (or 609228 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 12184420 is about 3490.6188563061. The cubic root of 12184420 is about 230.1097145114.

The spelling of 12184420 in words is "twelve million, one hundred eighty-four thousand, four hundred twenty".