8420519 has 2 divisors, whose sum is σ = 8420520. Its totient is φ = 8420518.

The previous prime is 8420509. The next prime is 8420521. The reversal of 8420519 is 9150248.

8420519 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 is a cyclic number.

It is not a de Polignac number, because 8420519 - 2⁸ = 8420263 is a prime.

It is a super-2 number, since 2×8420519² = 141810280458722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 8420521, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 8420491 and 8420500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8420509) 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 as a sum of consecutive naturals, namely, 4210259 + 4210260.

It is an arithmetic number, because the mean of its divisors is an integer number (4210260).

Almost surely, 2^8420519 is an apocalyptic number.

8420519 is a deficient number, since it is larger than the sum of its proper divisors (1).

8420519 is an equidigital number, since it uses as much as digits as its factorization.

8420519 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 8420519 is about 2901.8130539371. The cubic root of 8420519 is about 203.4446561121. Note that the first 3 decimals are identical.

The spelling of 8420519 in words is "eight million, four hundred twenty thousand, five hundred nineteen".