13721085 has 48 divisors (see below), whose sum is σ = 27840384. Its totient is φ = 6120576.

The previous prime is 13721063. The next prime is 13721093. The reversal of 13721085 is 58012731.

13721085 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13721085 - 2¹⁰ = 13720061 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13039 + ... + 14051.

It is an arithmetic number, because the mean of its divisors is an integer number (580008).

Almost surely, 2^13721085 is an apocalyptic number.

13721085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13721085 is an abundant number, since it is smaller than the sum of its proper divisors (14119299).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13721085 is a wasteful number, since it uses less digits than its factorization.

13721085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074 (or 1071 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 13721085 is about 3704.1982938282. The cubic root of 13721085 is about 239.4029429939.

The spelling of 13721085 in words is "thirteen million, seven hundred twenty-one thousand, eighty-five".