12420180 has 36 divisors (see below), whose sum is σ = 37675092. Its totient is φ = 3312000.

The previous prime is 12420151. The next prime is 12420211. The reversal of 12420180 is 8102421.

It can be written as a sum of positive squares in 2 ways, for example, as 1648656 + 10771524 = 1284^2 + 3282^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

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 11 ways as a sum of consecutive naturals, for example, 34321 + ... + 34680.

Almost surely, 2^12420180 is an apocalyptic number.

12420180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12420180 is an abundant number, since it is smaller than the sum of its proper divisors (25254912).

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

12420180 is a wasteful number, since it uses less digits than its factorization.

12420180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69016 (or 69011 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 12420180 is about 3524.2275749446. The cubic root of 12420180 is about 231.5843976352.

The spelling of 12420180 in words is "twelve million, four hundred twenty thousand, one hundred eighty".