5806921 has 4 divisors (see below), whose sum is σ = 5821200. Its totient is φ = 5792644.

The previous prime is 5806909. The next prime is 5806937. The reversal of 5806921 is 1296085.

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 5806921 - 2¹¹ = 5804873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5806901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6511 + ... + 7348.

It is an arithmetic number, because the mean of its divisors is an integer number (1455300).

Almost surely, 2^5806921 is an apocalyptic number.

It is an amenable number.

5806921 is a deficient number, since it is larger than the sum of its proper divisors (14279).

5806921 is a wasteful number, since it uses less digits than its factorization.

5806921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14278.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 5806921 is about 2409.7553817763. The cubic root of 5806921 is about 179.7416148693.

The spelling of 5806921 in words is "five million, eight hundred six thousand, nine hundred twenty-one".