13825729 has 4 divisors (see below), whose sum is σ = 13847940. Its totient is φ = 13803520.

The previous prime is 13825717. The next prime is 13825741. The reversal of 13825729 is 92752831.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (13825717) and next prime (13825741).

It can be written as a sum of positive squares in 2 ways, for example, as 5856400 + 7969329 = 2420^2 + 2823^2 .

It is a cyclic number.

It is not a de Polignac number, because 13825729 - 2⁵ = 13825697 is a prime.

It is a super-3 number, since 3×13825729³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13825769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10144 + ... + 11425.

It is an arithmetic number, because the mean of its divisors is an integer number (3461985).

Almost surely, 2^13825729 is an apocalyptic number.

It is an amenable number.

13825729 is a deficient number, since it is larger than the sum of its proper divisors (22211).

13825729 is an equidigital number, since it uses as much as digits as its factorization.

13825729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22210.

The product of its digits is 30240, while the sum is 37.

The square root of 13825729 is about 3718.2965185687. The cubic root of 13825729 is about 240.0100053699.

The spelling of 13825729 in words is "thirteen million, eight hundred twenty-five thousand, seven hundred twenty-nine".