42105619 has 2 divisors, whose sum is σ = 42105620. Its totient is φ = 42105618.

The previous prime is 42105611. The next prime is 42105629. The reversal of 42105619 is 91650124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42105619 - 2³ = 42105611 is a prime.

It is a super-2 number, since 2×42105619² = 3545766302746322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42105611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21052809 + 21052810.

It is an arithmetic number, because the mean of its divisors is an integer number (21052810).

Almost surely, 2^42105619 is an apocalyptic number.

42105619 is a deficient number, since it is larger than the sum of its proper divisors (1).

42105619 is an equidigital number, since it uses as much as digits as its factorization.

42105619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 42105619 is about 6488.8842646483. The cubic root of 42105619 is about 347.8937971382.

It can be divided in two parts, 42105 and 619, that added together give a palindrome (42724).

The spelling of 42105619 in words is "forty-two million, one hundred five thousand, six hundred nineteen".