12505120 has 24 divisors (see below), whose sum is σ = 29543724. Its totient is φ = 5001984.

The previous prime is 12505117. The next prime is 12505133. The reversal of 12505120 is 2150521.

It can be written as a sum of positive squares in 2 ways, for example, as 10419984 + 2085136 = 3228^2 + 1444^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 12505094 and 12505103.

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, 38919 + ... + 39238.

Almost surely, 2^12505120 is an apocalyptic number.

12505120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12505120 is an abundant number, since it is smaller than the sum of its proper divisors (17038604).

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

12505120 is an equidigital number, since it uses as much as digits as its factorization.

12505120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78172 (or 78164 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 12505120 is about 3536.2579091463. The cubic root of 12505120 is about 232.1111239351. Note that the first 4 decimals are identical.

Adding to 12505120 its reverse (2150521), we get a palindrome (14655641).

The spelling of 12505120 in words is "twelve million, five hundred five thousand, one hundred twenty".