42242479 has 2 divisors, whose sum is σ = 42242480. Its totient is φ = 42242478.

The previous prime is 42242477. The next prime is 42242503. The reversal of 42242479 is 97424224.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42242479 - 2¹ = 42242477 is a prime.

Together with 42242477, 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 (42242471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21121239 + 21121240.

It is an arithmetic number, because the mean of its divisors is an integer number (21121240).

Almost surely, 2^42242479 is an apocalyptic number.

42242479 is a deficient number, since it is larger than the sum of its proper divisors (1).

42242479 is an equidigital number, since it uses as much as digits as its factorization.

42242479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 34.

The square root of 42242479 is about 6499.4214357895. The cubic root of 42242479 is about 348.2703205285.

The spelling of 42242479 in words is "forty-two million, two hundred forty-two thousand, four hundred seventy-nine".