12445400 has 48 divisors (see below), whose sum is σ = 31571640. Its totient is φ = 4524800.

The previous prime is 12445397. The next prime is 12445409. The reversal of 12445400 is 454421.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12445409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 629 + ... + 5028.

Almost surely, 2^12445400 is an apocalyptic number.

12445400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12445400 is an abundant number, since it is smaller than the sum of its proper divisors (19126240).

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

12445400 is a wasteful number, since it uses less digits than its factorization.

12445400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5684 (or 5675 counting only the distinct ones).

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

The square root of 12445400 is about 3527.8038494225. The cubic root of 12445400 is about 231.7410408226.

Adding to 12445400 its reverse (454421), we get a palindrome (12899821).

The spelling of 12445400 in words is "twelve million, four hundred forty-five thousand, four hundred".