42055879 has 2 divisors, whose sum is σ = 42055880. Its totient is φ = 42055878.

The previous prime is 42055877. The next prime is 42055883. The reversal of 42055879 is 97855024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42055879 - 2¹ = 42055877 is a prime.

Together with 42055877, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42055877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21027939 + 21027940.

It is an arithmetic number, because the mean of its divisors is an integer number (21027940).

Almost surely, 2^42055879 is an apocalyptic number.

42055879 is a deficient number, since it is larger than the sum of its proper divisors (1).

42055879 is an equidigital number, since it uses as much as digits as its factorization.

42055879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 42055879 is about 6485.0504238595. The cubic root of 42055879 is about 347.7567524375.

The spelling of 42055879 in words is "forty-two million, fifty-five thousand, eight hundred seventy-nine".