12421003 has 16 divisors (see below), whose sum is σ = 15197440. Its totient is φ = 9914400.

The previous prime is 12420979. The next prime is 12421007. The reversal of 12421003 is 30012421.

It is a cyclic number.

It is not a de Polignac number, because 12421003 - 2¹⁷ = 12289931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12421007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7348 + ... + 8878.

It is an arithmetic number, because the mean of its divisors is an integer number (949840).

Almost surely, 2^12421003 is an apocalyptic number.

12421003 is a deficient number, since it is larger than the sum of its proper divisors (2776437).

12421003 is a wasteful number, since it uses less digits than its factorization.

12421003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1618.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 12421003 is about 3524.3443361851. The cubic root of 12421003 is about 231.5895126913.

Adding to 12421003 its reverse (30012421), we get a palindrome (42433424).

The spelling of 12421003 in words is "twelve million, four hundred twenty-one thousand, three".