12508220 has 24 divisors (see below), whose sum is σ = 26978784. Its totient is φ = 4867776.

The previous prime is 12508219. The next prime is 12508229. The reversal of 12508220 is 2280521.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 12508192 and 12508201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12508229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7712 + ... + 9191.

It is an arithmetic number, because the mean of its divisors is an integer number (1124116).

Almost surely, 2^12508220 is an apocalyptic number.

12508220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12508220 is an abundant number, since it is smaller than the sum of its proper divisors (14470564).

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

12508220 is a wasteful number, since it uses less digits than its factorization.

12508220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16949 (or 16947 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 12508220 is about 3536.6961984315. The cubic root of 12508220 is about 232.1303023472.

Adding to 12508220 its reverse (2280521), we get a palindrome (14788741).

The spelling of 12508220 in words is "twelve million, five hundred eight thousand, two hundred twenty".