12102520 has 16 divisors (see below), whose sum is σ = 27230760. Its totient is φ = 4840992.

The previous prime is 12102511. The next prime is 12102523. The reversal of 12102520 is 2520121.

It is a self number, because there is not a number n which added to its sum of digits gives 12102520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151242 + ... + 151321.

Almost surely, 2^12102520 is an apocalyptic number.

12102520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12102520 is an abundant number, since it is smaller than the sum of its proper divisors (15128240).

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

12102520 is a wasteful number, since it uses less digits than its factorization.

12102520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302574 (or 302570 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 12102520 is about 3478.8676318595. The cubic root of 12102520 is about 229.5929789401.

Adding to 12102520 its reverse (2520121), we get a palindrome (14622641).

The spelling of 12102520 in words is "twelve million, one hundred two thousand, five hundred twenty".