42605879 has 2 divisors, whose sum is σ = 42605880. Its totient is φ = 42605878.

The previous prime is 42605869. The next prime is 42605881. The reversal of 42605879 is 97850624.

42605879 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42605879 - 2⁸ = 42605623 is a prime.

Together with 42605881, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42605869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21302939 + 21302940.

It is an arithmetic number, because the mean of its divisors is an integer number (21302940).

Almost surely, 2^42605879 is an apocalyptic number.

42605879 is a deficient number, since it is larger than the sum of its proper divisors (1).

42605879 is an equidigital number, since it uses as much as digits as its factorization.

42605879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 42605879 is about 6527.3179024772. The cubic root of 42605879 is about 349.2661604044.

The spelling of 42605879 in words is "forty-two million, six hundred five thousand, eight hundred seventy-nine".