42345019 has 2 divisors, whose sum is σ = 42345020. Its totient is φ = 42345018.

The previous prime is 42344999. The next prime is 42345029. The reversal of 42345019 is 91054324.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42345019 - 2⁵ = 42344987 is a prime.

It is a super-2 number, since 2×42345019² = 3586201268220722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42345029) 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, 21172509 + 21172510.

It is an arithmetic number, because the mean of its divisors is an integer number (21172510).

Almost surely, 2^42345019 is an apocalyptic number.

42345019 is a deficient number, since it is larger than the sum of its proper divisors (1).

42345019 is an equidigital number, since it uses as much as digits as its factorization.

42345019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 42345019 is about 6507.3050489431. The cubic root of 42345019 is about 348.5518916134.

The spelling of 42345019 in words is "forty-two million, three hundred forty-five thousand, nineteen".