12935421 has 18 divisors (see below), whose sum is σ = 19362330. Its totient is φ = 8321376.

The previous prime is 12935411. The next prime is 12935431. The reversal of 12935421 is 12453921.

It is an interprime number because it is at equal distance from previous prime (12935411) and next prime (12935431).

It can be written as a sum of positive squares in 3 ways, for example, as 783225 + 12152196 = 885^2 + 3486^2 .

It is not a de Polignac number, because 12935421 - 2²³ = 4546813 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12935411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6715 + ... + 8423.

It is an arithmetic number, because the mean of its divisors is an integer number (1075685).

Almost surely, 2^12935421 is an apocalyptic number.

It is an amenable number.

12935421 is a deficient number, since it is larger than the sum of its proper divisors (6426909).

12935421 is a wasteful number, since it uses less digits than its factorization.

12935421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1773 (or 1741 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 12935421 is about 3596.5846298954. The cubic root of 12935421 is about 234.7434713928.

The spelling of 12935421 in words is "twelve million, nine hundred thirty-five thousand, four hundred twenty-one".