42135619 has 2 divisors, whose sum is σ = 42135620. Its totient is φ = 42135618.

The previous prime is 42135607. The next prime is 42135623. The reversal of 42135619 is 91653124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42135619 - 2⁷ = 42135491 is a prime.

It is a super-2 number, since 2×42135619² = 3550820777026322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42135629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21067809 + 21067810.

It is an arithmetic number, because the mean of its divisors is an integer number (21067810).

Almost surely, 2^42135619 is an apocalyptic number.

42135619 is a deficient number, since it is larger than the sum of its proper divisors (1).

42135619 is an equidigital number, since it uses as much as digits as its factorization.

42135619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 31.

The square root of 42135619 is about 6491.1954985195. The cubic root of 42135619 is about 347.9764016014.

The spelling of 42135619 in words is "forty-two million, one hundred thirty-five thousand, six hundred nineteen".