12505040 has 60 divisors (see below), whose sum is σ = 30755844. Its totient is φ = 4727808.

The previous prime is 12505039. The next prime is 12505057. The reversal of 12505040 is 4050521.

It can be written as a sum of positive squares in 2 ways, for example, as 2795584 + 9709456 = 1672^2 + 3116^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28664 + ... + 29096.

Almost surely, 2^12505040 is an apocalyptic number.

12505040 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 12505040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15377922).

12505040 is an abundant number, since it is smaller than the sum of its proper divisors (18250804).

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

12505040 is a wasteful number, since it uses less digits than its factorization.

12505040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484 (or 459 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 12505040 is about 3536.2465977361. The cubic root of 12505040 is about 232.1106289664.

Adding to 12505040 its reverse (4050521), we get a palindrome (16555561).

The spelling of 12505040 in words is "twelve million, five hundred five thousand, forty".