12100420 has 12 divisors (see below), whose sum is σ = 25410924. Its totient is φ = 4840160.

The previous prime is 12100411. The next prime is 12100441. The reversal of 12100420 is 2400121.

It can be written as a sum of positive squares in 2 ways, for example, as 3326976 + 8773444 = 1824^2 + 2962^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 12100397 and 12100406.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 302491 + ... + 302530.

It is an arithmetic number, because the mean of its divisors is an integer number (2117577).

Almost surely, 2^12100420 is an apocalyptic number.

12100420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12100420 is an abundant number, since it is smaller than the sum of its proper divisors (13310504).

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

12100420 is a wasteful number, since it uses less digits than its factorization.

12100420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605030 (or 605028 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 12100420 is about 3478.5657964167. The cubic root of 12100420 is about 229.5796986991.

Adding to 12100420 its reverse (2400121), we get a palindrome (14500541).

The spelling of 12100420 in words is "twelve million, one hundred thousand, four hundred twenty".