12544420 has 24 divisors (see below), whose sum is σ = 30106944. Its totient is φ = 4300896.

The previous prime is 12544409. The next prime is 12544423. The reversal of 12544420 is 2444521.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12544391 and 12544400.

It is not an unprimeable number, because it can be changed into a prime (12544423) 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, 44662 + ... + 44941.

It is an arithmetic number, because the mean of its divisors is an integer number (1254456).

Almost surely, 2^12544420 is an apocalyptic number.

12544420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12544420 is an abundant number, since it is smaller than the sum of its proper divisors (17562524).

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

12544420 is a wasteful number, since it uses less digits than its factorization.

12544420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89619 (or 89617 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 12544420 is about 3541.8102715984. The cubic root of 12544420 is about 232.3540225215.

Adding to 12544420 its reverse (2444521), we get a palindrome (14988941).

The spelling of 12544420 in words is "twelve million, five hundred forty-four thousand, four hundred twenty".