5205439 has 4 divisors (see below), whose sum is σ = 5257080. Its totient is φ = 5153800.

The previous prime is 5205437. The next prime is 5205461. The reversal of 5205439 is 9345025.

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 5205439 - 2¹ = 5205437 is a prime.

It is a Duffinian number.

It is a plaindrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5205433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25669 + ... + 25870.

It is an arithmetic number, because the mean of its divisors is an integer number (1314270).

Almost surely, 2^5205439 is an apocalyptic number.

5205439 is a deficient number, since it is larger than the sum of its proper divisors (51641).

5205439 is a wasteful number, since it uses less digits than its factorization.

5205439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51640.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 5205439 is about 2281.5431181549. The cubic root of 5205439 is about 173.3082035396.

The spelling of 5205439 in words is "five million, two hundred five thousand, four hundred thirty-nine".