12438621 has 24 divisors (see below), whose sum is σ = 19828536. Its totient is φ = 7464960.

The previous prime is 12438599. The next prime is 12438631. The reversal of 12438621 is 12683421.

12438621 is a `hidden beast` number, since 1 + 2 + 4 + 38 + 621 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 12996 + 12425625 = 114^2 + 3525^2 .

It is not a de Polignac number, because 12438621 - 2¹⁰ = 12437597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12438631) 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, 3501 + ... + 6093.

It is an arithmetic number, because the mean of its divisors is an integer number (826189).

Almost surely, 2^12438621 is an apocalyptic number.

It is an amenable number.

12438621 is a deficient number, since it is larger than the sum of its proper divisors (7389915).

12438621 is a wasteful number, since it uses less digits than its factorization.

12438621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2653 (or 2650 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 12438621 is about 3526.8429225017. The cubic root of 12438621 is about 231.6989567905.

The spelling of 12438621 in words is "twelve million, four hundred thirty-eight thousand, six hundred twenty-one".