12421013 has 6 divisors (see below), whose sum is σ = 13652982. Its totient is φ = 11291720.

The previous prime is 12421009. The next prime is 12421021. The reversal of 12421013 is 31012421.

It can be written as a sum of positive squares in only one way, i.e., 11035684 + 1385329 = 3322^2 + 1177^2 .

It is not a de Polignac number, because 12421013 - 2² = 12421009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12451013) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51206 + ... + 51447.

It is an arithmetic number, because the mean of its divisors is an integer number (2275497).

Almost surely, 2^12421013 is an apocalyptic number.

It is an amenable number.

12421013 is a deficient number, since it is larger than the sum of its proper divisors (1231969).

12421013 is a wasteful number, since it uses less digits than its factorization.

12421013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102675 (or 102664 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 12421013 is about 3524.3457548884. The cubic root of 12421013 is about 231.5895748412.

Adding to 12421013 its reverse (31012421), we get a palindrome (43433434).

The spelling of 12421013 in words is "twelve million, four hundred twenty-one thousand, thirteen".