13440825 has 72 divisors (see below), whose sum is σ = 25998336. Its totient is φ = 6624000.

The previous prime is 13440821. The next prime is 13440839. The reversal of 13440825 is 52804431.

13440825 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 13440825 - 2² = 13440821 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13440821) 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 71 ways as a sum of consecutive naturals, for example, 285952 + ... + 285998.

It is an arithmetic number, because the mean of its divisors is an integer number (361088).

Almost surely, 2^13440825 is an apocalyptic number.

13440825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13440825 is a deficient number, since it is larger than the sum of its proper divisors (12557511).

13440825 is a wasteful number, since it uses less digits than its factorization.

13440825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 13440825 is about 3666.1730728377. The cubic root of 13440825 is about 237.7617428281.

The spelling of 13440825 in words is "thirteen million, four hundred forty thousand, eight hundred twenty-five".