5805421 has 4 divisors (see below), whose sum is σ = 5840352. Its totient is φ = 5770492.

The previous prime is 5805419. The next prime is 5805439. The reversal of 5805421 is 1245085.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1245085 = 5 ⋅249017.

It is a cyclic number.

It is not a de Polignac number, because 5805421 - 2¹ = 5805419 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 (5805491) 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, 17215 + ... + 17548.

It is an arithmetic number, because the mean of its divisors is an integer number (1460088).

Almost surely, 2^5805421 is an apocalyptic number.

It is an amenable number.

5805421 is a deficient number, since it is larger than the sum of its proper divisors (34931).

5805421 is a wasteful number, since it uses less digits than its factorization.

5805421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34930.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 5805421 is about 2409.4441267645. Note that the first 3 decimals coincide. The cubic root of 5805421 is about 179.7261370375.

It can be divided in two parts, 5805 and 421, that added together give a palindrome (6226).

The spelling of 5805421 in words is "five million, eight hundred five thousand, four hundred twenty-one".