42642179 has 2 divisors, whose sum is σ = 42642180. Its totient is φ = 42642178.

The previous prime is 42642133. The next prime is 42642247. The reversal of 42642179 is 97124624.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42642179 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42642679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21321089 + 21321090.

It is an arithmetic number, because the mean of its divisors is an integer number (21321090).

Almost surely, 2^42642179 is an apocalyptic number.

42642179 is a deficient number, since it is larger than the sum of its proper divisors (1).

42642179 is an equidigital number, since it uses as much as digits as its factorization.

42642179 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 35.

The square root of 42642179 is about 6530.0979318843. The cubic root of 42642179 is about 349.3653232663.

The spelling of 42642179 in words is "forty-two million, six hundred forty-two thousand, one hundred seventy-nine".