12440621 has 8 divisors (see below), whose sum is σ = 12933984. Its totient is φ = 11955600.

The previous prime is 12440591. The next prime is 12440629. The reversal of 12440621 is 12604421.

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 12440621 - 2⁶ = 12440557 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12440593 and 12440602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12440629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1046 + ... + 5096.

It is an arithmetic number, because the mean of its divisors is an integer number (1616748).

Almost surely, 2^12440621 is an apocalyptic number.

It is an amenable number.

12440621 is a deficient number, since it is larger than the sum of its proper divisors (493363).

12440621 is an equidigital number, since it uses as much as digits as its factorization.

12440621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4171.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 12440621 is about 3527.1264508095. The cubic root of 12440621 is about 231.7113743803.

The spelling of 12440621 in words is "twelve million, four hundred forty thousand, six hundred twenty-one".