12505320 has 64 divisors (see below), whose sum is σ = 41688000. Its totient is φ = 3334464.

The previous prime is 12505313. The next prime is 12505327. The reversal of 12505320 is 2350521.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12505313) and next prime (12505327).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12505293 and 12505302.

It is not an unprimeable number, because it can be changed into a prime (12505327) 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 15 ways as a sum of consecutive naturals, for example, 4710 + ... + 6869.

It is an arithmetic number, because the mean of its divisors is an integer number (651375).

Almost surely, 2^12505320 is an apocalyptic number.

12505320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12505320 is an abundant number, since it is smaller than the sum of its proper divisors (29182680).

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

12505320 is a wasteful number, since it uses less digits than its factorization.

12505320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11599 (or 11589 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 12505320 is about 3536.2861875137. The cubic root of 12505320 is about 232.1123613477.

Adding to 12505320 its reverse (2350521), we get a palindrome (14855841).

The spelling of 12505320 in words is "twelve million, five hundred five thousand, three hundred twenty".