12102420 has 72 divisors (see below), whose sum is σ = 37269792. Its totient is φ = 2932160.

The previous prime is 12102403. The next prime is 12102427. The reversal of 12102420 is 2420121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 12102396 and 12102405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102427) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 6427 + ... + 8093.

It is an arithmetic number, because the mean of its divisors is an integer number (517636).

Almost surely, 2^12102420 is an apocalyptic number.

12102420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12102420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18634896).

12102420 is an abundant number, since it is smaller than the sum of its proper divisors (25167372).

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

12102420 is a wasteful number, since it uses less digits than its factorization.

12102420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701 (or 1688 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 12102420 is about 3478.8532593370. The cubic root of 12102420 is about 229.5923465825.

Adding to 12102420 its reverse (2420121), we get a palindrome (14522541).

The spelling of 12102420 in words is "twelve million, one hundred two thousand, four hundred twenty".