42019 has 2 divisors, whose sum is σ = 42020. Its totient is φ = 42018.

The previous prime is 42017. The next prime is 42023. The reversal of 42019 is 91024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42019 - 2¹ = 42017 is a prime.

It is a super-2 number, since 2×42019² = 3531192722, which contains 22 as substring.

Together with 42017, it forms a pair of twin primes.

It is a plaindrome in base 7 and base 14.

It is a junction number, because it is equal to n+sod(n) for n = 41993 and 42011.

It is not a weakly prime, because it can be changed into another prime (42013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21009 + 21010.

It is an arithmetic number, because the mean of its divisors is an integer number (21010).

2⁴²⁰¹⁹ is an apocalyptic number.

42019 is a deficient number, since it is larger than the sum of its proper divisors (1).

42019 is an equidigital number, since it uses as much as digits as its factorization.

42019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 42019 is about 204.9853653313. The cubic root of 42019 is about 34.7655072861.

The spelling of 42019 in words is "forty-two thousand, nineteen".