12432040 has 16 divisors (see below), whose sum is σ = 27972180. Its totient is φ = 4972800.

The previous prime is 12432011. The next prime is 12432053. The reversal of 12432040 is 4023421.

It can be written as a sum of positive squares in 2 ways, for example, as 12404484 + 27556 = 3522^2 + 166^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 155361 + ... + 155440.

Almost surely, 2^12432040 is an apocalyptic number.

12432040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12432040 is an abundant number, since it is smaller than the sum of its proper divisors (15540140).

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

12432040 is a wasteful number, since it uses less digits than its factorization.

12432040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310812 (or 310808 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 12432040 is about 3525.9098116656. The cubic root of 12432040 is about 231.6580873129.

Adding to 12432040 its reverse (4023421), we get a palindrome (16455461).

The spelling of 12432040 in words is "twelve million, four hundred thirty-two thousand, forty".