12403621 has 8 divisors (see below), whose sum is σ = 12794904. Its totient is φ = 12015360.

The previous prime is 12403609. The next prime is 12403639. The reversal of 12403621 is 12630421.

It can be written as a sum of positive squares in 4 ways, for example, as 5354596 + 7049025 = 2314^2 + 2655^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12403621 - 2¹¹ = 12401573 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 (12403661) 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 7 ways as a sum of consecutive naturals, for example, 9801 + ... + 10993.

It is an arithmetic number, because the mean of its divisors is an integer number (1599363).

Almost surely, 2^12403621 is an apocalyptic number.

It is an amenable number.

12403621 is a deficient number, since it is larger than the sum of its proper divisors (391283).

12403621 is a wasteful number, since it uses less digits than its factorization.

12403621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1511.

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

The square root of 12403621 is about 3521.8774822529. The cubic root of 12403621 is about 231.4814331711.

The spelling of 12403621 in words is "twelve million, four hundred three thousand, six hundred twenty-one".