12504040 has 16 divisors (see below), whose sum is σ = 28134180. Its totient is φ = 5001600.

The previous prime is 12504031. The next prime is 12504043. The reversal of 12504040 is 4040521.

It can be written as a sum of positive squares in 2 ways, for example, as 12489156 + 14884 = 3534^2 + 122^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12504043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156261 + ... + 156340.

Almost surely, 2^12504040 is an apocalyptic number.

12504040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12504040 is an abundant number, since it is smaller than the sum of its proper divisors (15630140).

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

12504040 is a wasteful number, since it uses less digits than its factorization.

12504040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312612 (or 312608 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 12504040 is about 3536.1052020549. The cubic root of 12504040 is about 232.1044416793.

Adding to 12504040 its reverse (4040521), we get a palindrome (16544561).

The spelling of 12504040 in words is "twelve million, five hundred four thousand, forty".