12421603 has 4 divisors (see below), whose sum is σ = 12757360. Its totient is φ = 12085848.

The previous prime is 12421601. The next prime is 12421621. The reversal of 12421603 is 30612421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12421603 - 2¹ = 12421601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12421601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167823 + ... + 167896.

It is an arithmetic number, because the mean of its divisors is an integer number (3189340).

Almost surely, 2^12421603 is an apocalyptic number.

12421603 is a deficient number, since it is larger than the sum of its proper divisors (335757).

12421603 is an equidigital number, since it uses as much as digits as its factorization.

12421603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335756.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 12421603 is about 3524.4294573732. The cubic root of 12421603 is about 231.5932416298.

The spelling of 12421603 in words is "twelve million, four hundred twenty-one thousand, six hundred three".