13085621 has 4 divisors (see below), whose sum is σ = 13102272. Its totient is φ = 13068972.

The previous prime is 13085617. The next prime is 13085651. The reversal of 13085621 is 12658031.

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 13085621 - 2² = 13085617 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 (13085651) 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, 7085 + ... + 8738.

It is an arithmetic number, because the mean of its divisors is an integer number (3275568).

Almost surely, 2^13085621 is an apocalyptic number.

It is an amenable number.

13085621 is a deficient number, since it is larger than the sum of its proper divisors (16651).

13085621 is an equidigital number, since it uses as much as digits as its factorization.

13085621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16650.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 13085621 is about 3617.4052855604. The cubic root of 13085621 is about 235.6485540272.

The spelling of 13085621 in words is "thirteen million, eighty-five thousand, six hundred twenty-one".