12445040 has 40 divisors (see below), whose sum is σ = 29344848. Its totient is φ = 4907520.

The previous prime is 12445039. The next prime is 12445067. The reversal of 12445040 is 4054421.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4775 + ... + 6905.

Almost surely, 2^12445040 is an apocalyptic number.

12445040 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 12445040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14672424).

12445040 is an abundant number, since it is smaller than the sum of its proper divisors (16899808).

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

12445040 is a wasteful number, since it uses less digits than its factorization.

12445040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2217 (or 2211 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 12445040 is about 3527.7528258085. The cubic root of 12445040 is about 231.7388063269.

Adding to 12445040 its reverse (4054421), we get a palindrome (16499461).

The spelling of 12445040 in words is "twelve million, four hundred forty-five thousand, forty".