5206421 has 4 divisors (see below), whose sum is σ = 5679744. Its totient is φ = 4733100.

The previous prime is 5206417. The next prime is 5206423. The reversal of 5206421 is 1246025.

It is a happy number.

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 5206421 - 2² = 5206417 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 5206393 and 5206402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5206423) 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, 236645 + ... + 236666.

It is an arithmetic number, because the mean of its divisors is an integer number (1419936).

Almost surely, 2^5206421 is an apocalyptic number.

It is an amenable number.

5206421 is a deficient number, since it is larger than the sum of its proper divisors (473323).

5206421 is a wasteful number, since it uses less digits than its factorization.

5206421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473322.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 5206421 is about 2281.7583132313. The cubic root of 5206421 is about 173.3191009846.

The spelling of 5206421 in words is "five million, two hundred six thousand, four hundred twenty-one".