12520040 has 32 divisors (see below), whose sum is σ = 30338280. Its totient is φ = 4622592.

The previous prime is 12520037. The next prime is 12520043. The reversal of 12520040 is 4002521.

12520040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12520037) and next prime (12520043).

It can be written as a sum of positive squares in 4 ways, for example, as 10719076 + 1800964 = 3274^2 + 1342^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12519997 and 12520024.

It is not an unprimeable number, because it can be changed into a prime (12520043) 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, 11519 + ... + 12558.

Almost surely, 2^12520040 is an apocalyptic number.

12520040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12520040 is an abundant number, since it is smaller than the sum of its proper divisors (17818240).

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

12520040 is a wasteful number, since it uses less digits than its factorization.

12520040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24101 (or 24097 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 12520040 is about 3538.3668549205. The cubic root of 12520040 is about 232.2033987152.

Adding to 12520040 its reverse (4002521), we get a palindrome (16522561).

The spelling of 12520040 in words is "twelve million, five hundred twenty thousand, forty".