5200421 has 2 divisors, whose sum is σ = 5200422. Its totient is φ = 5200420.

The previous prime is 5200397. The next prime is 5200423. The reversal of 5200421 is 1240025.

5200421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4120900 + 1079521 = 2030^2 + 1039^2 .

It is a cyclic number.

It is not a de Polignac number, because 5200421 - 2¹⁸ = 4938277 is a prime.

It is a Sophie Germain prime.

Together with 5200423, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 5200396 and 5200405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5200423) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2600210 + 2600211.

It is an arithmetic number, because the mean of its divisors is an integer number (2600211).

Almost surely, 2^5200421 is an apocalyptic number.

It is an amenable number.

5200421 is a deficient number, since it is larger than the sum of its proper divisors (1).

5200421 is an equidigital number, since it uses as much as digits as its factorization.

5200421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 5200421 is about 2280.4431586865. The cubic root of 5200421 is about 173.2524964121.

Adding to 5200421 its reverse (1240025), we get a palindrome (6440446).

It can be divided in two parts, 52004 and 21, that added together give a palindrome (52025).

The spelling of 5200421 in words is "five million, two hundred thousand, four hundred twenty-one".