13425439 has 4 divisors (see below), whose sum is σ = 13445560. Its totient is φ = 13405320.

The previous prime is 13425437. The next prime is 13425443. The reversal of 13425439 is 93452431.

13425439 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 13425439 - 2¹ = 13425437 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13425439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13425431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9024 + ... + 10405.

It is an arithmetic number, because the mean of its divisors is an integer number (3361390).

Almost surely, 2^13425439 is an apocalyptic number.

13425439 is a deficient number, since it is larger than the sum of its proper divisors (20121).

13425439 is an equidigital number, since it uses as much as digits as its factorization.

13425439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20120.

The product of its digits is 12960, while the sum is 31.

The square root of 13425439 is about 3664.0740985957. The cubic root of 13425439 is about 237.6709845366.

The spelling of 13425439 in words is "thirteen million, four hundred twenty-five thousand, four hundred thirty-nine".