5421421 has 2 divisors, whose sum is σ = 5421422. Its totient is φ = 5421420.

The previous prime is 5421413. The next prime is 5421433. The reversal of 5421421 is 1241245.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4888521 + 532900 = 2211^2 + 730^2 .

It is a cyclic number.

It is not a de Polignac number, because 5421421 - 2³ = 5421413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5422421) 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 as a sum of consecutive naturals, namely, 2710710 + 2710711.

It is an arithmetic number, because the mean of its divisors is an integer number (2710711).

Almost surely, 2^5421421 is an apocalyptic number.

It is an amenable number.

5421421 is a deficient number, since it is larger than the sum of its proper divisors (1).

5421421 is an equidigital number, since it uses as much as digits as its factorization.

5421421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 320, while the sum is 19.

The square root of 5421421 is about 2328.3945112459. The cubic root of 5421421 is about 175.6727411233.

Adding to 5421421 its reverse (1241245), we get a palindrome (6662666).

The spelling of 5421421 in words is "five million, four hundred twenty-one thousand, four hundred twenty-one".