13722765 has 16 divisors (see below), whose sum is σ = 25093248. Its totient is φ = 6273216.

The previous prime is 13722749. The next prime is 13722767. The reversal of 13722765 is 56722731.

It is not a de Polignac number, because 13722765 - 2⁴ = 13722749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13722767) 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 15 ways as a sum of consecutive naturals, for example, 65242 + ... + 65451.

It is an arithmetic number, because the mean of its divisors is an integer number (1568328).

Almost surely, 2^13722765 is an apocalyptic number.

13722765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13722765 is a deficient number, since it is larger than the sum of its proper divisors (11370483).

13722765 is a wasteful number, since it uses less digits than its factorization.

13722765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130708.

The product of its digits is 17640, while the sum is 33.

The square root of 13722765 is about 3704.4250566046. The cubic root of 13722765 is about 239.4127133712.

The spelling of 13722765 in words is "thirteen million, seven hundred twenty-two thousand, seven hundred sixty-five".