13380621 has 4 divisors (see below), whose sum is σ = 17840832. Its totient is φ = 8920412.

The previous prime is 13380599. The next prime is 13380659. The reversal of 13380621 is 12608331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13380621 - 2²¹ = 11283469 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13380591 and 13380600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13300621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2230101 + ... + 2230106.

It is an arithmetic number, because the mean of its divisors is an integer number (4460208).

Almost surely, 2^13380621 is an apocalyptic number.

It is an amenable number.

13380621 is a deficient number, since it is larger than the sum of its proper divisors (4460211).

13380621 is an equidigital number, since it uses as much as digits as its factorization.

13380621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4460210.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 13380621 is about 3657.9531161566. The cubic root of 13380621 is about 237.4062181902.

Adding to 13380621 its reverse (12608331), we get a palindrome (25988952).

The spelling of 13380621 in words is "thirteen million, three hundred eighty thousand, six hundred twenty-one".