13721895 has 48 divisors (see below), whose sum is σ = 27331200. Its totient is φ = 6298560.

The previous prime is 13721891. The next prime is 13721927. The reversal of 13721895 is 59812731.

13721895 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 13721895 - 2² = 13721891 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13721891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8676 + ... + 10134.

It is an arithmetic number, because the mean of its divisors is an integer number (569400).

Almost surely, 2^13721895 is an apocalyptic number.

13721895 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13721895 is a deficient number, since it is larger than the sum of its proper divisors (13609305).

13721895 is a wasteful number, since it uses less digits than its factorization.

13721895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500 (or 1497 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 13721895 is about 3704.3076276141. The cubic root of 13721895 is about 239.4076538111.

The spelling of 13721895 in words is "thirteen million, seven hundred twenty-one thousand, eight hundred ninety-five".