42057019 has 2 divisors, whose sum is σ = 42057020. Its totient is φ = 42057018.

The previous prime is 42057017. The next prime is 42057073. The reversal of 42057019 is 91075024.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42057019 - 2¹ = 42057017 is a prime.

It is a super-2 number, since 2×42057019² = 3537585694332722, which contains 22 as substring.

Together with 42057017, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (42057011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21028509 + 21028510.

It is an arithmetic number, because the mean of its divisors is an integer number (21028510).

Almost surely, 2^42057019 is an apocalyptic number.

42057019 is a deficient number, since it is larger than the sum of its proper divisors (1).

42057019 is an equidigital number, since it uses as much as digits as its factorization.

42057019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 42057019 is about 6485.1383177231. The cubic root of 42057019 is about 347.7598945992.

The spelling of 42057019 in words is "forty-two million, fifty-seven thousand, nineteen".