5205409 has 4 divisors (see below), whose sum is σ = 5678640. Its totient is φ = 4732180.

The previous prime is 5205407. The next prime is 5205433. The reversal of 5205409 is 9045025.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5205409 - 2¹ = 5205407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5205407) 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, 236599 + ... + 236620.

It is an arithmetic number, because the mean of its divisors is an integer number (1419660).

Almost surely, 2^5205409 is an apocalyptic number.

It is an amenable number.

5205409 is a deficient number, since it is larger than the sum of its proper divisors (473231).

5205409 is a wasteful number, since it uses less digits than its factorization.

5205409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473230.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 5205409 is about 2281.5365436477. The cubic root of 5205409 is about 173.3078706022.

It can be divided in two parts, 520 and 5409, that added together give a square (5929 = 77²).

The spelling of 5205409 in words is "five million, two hundred five thousand, four hundred nine".