12421425 has 24 divisors (see below), whose sum is σ = 21248640. Its totient is φ = 6395200.

The previous prime is 12421417. The next prime is 12421427. The reversal of 12421425 is 52412421.

12421425 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12421425 - 2³ = 12421417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12421427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 681 + ... + 5030.

It is an arithmetic number, because the mean of its divisors is an integer number (885360).

Almost surely, 2^12421425 is an apocalyptic number.

12421425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12421425 is a deficient number, since it is larger than the sum of its proper divisors (8827215).

12421425 is a wasteful number, since it uses less digits than its factorization.

12421425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5753 (or 5748 counting only the distinct ones).

The product of its digits is 640, while the sum is 21.

The square root of 12421425 is about 3524.4042049686. The cubic root of 12421425 is about 231.5921353906.

Adding to 12421425 its reverse (52412421), we get a palindrome (64833846).

The spelling of 12421425 in words is "twelve million, four hundred twenty-one thousand, four hundred twenty-five".