420419 has 2 divisors, whose sum is σ = 420420. Its totient is φ = 420418.

The previous prime is 420397. The next prime is 420421. The reversal of 420419 is 914024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420419 - 2⁸ = 420163 is a prime.

It is a super-2 number, since 2×420419² = 353504271122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 420421, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420419.

It is not a weakly prime, because it can be changed into another prime (420439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210209 + 210210.

It is an arithmetic number, because the mean of its divisors is an integer number (210210).

2⁴²⁰⁴¹⁹ is an apocalyptic number.

420419 is a deficient number, since it is larger than the sum of its proper divisors (1).

420419 is an equidigital number, since it uses as much as digits as its factorization.

420419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 420419 is about 648.3972547752. The cubic root of 420419 is about 74.9136190678.

The spelling of 420419 in words is "four hundred twenty thousand, four hundred nineteen".