5205391 has 4 divisors (see below), whose sum is σ = 5316192. Its totient is φ = 5094592.

The previous prime is 5205377. The next prime is 5205407. The reversal of 5205391 is 1935025.

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 5205391 - 2²¹ = 3108239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5205341) 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, 55330 + ... + 55423.

It is an arithmetic number, because the mean of its divisors is an integer number (1329048).

Almost surely, 2^5205391 is an apocalyptic number.

5205391 is a deficient number, since it is larger than the sum of its proper divisors (110801).

5205391 is a wasteful number, since it uses less digits than its factorization.

5205391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110800.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 5205391 is about 2281.5325989343. The cubic root of 5205391 is about 173.3076708392.

The spelling of 5205391 in words is "five million, two hundred five thousand, three hundred ninety-one".