42424279 has 2 divisors, whose sum is σ = 42424280. Its totient is φ = 42424278.

The previous prime is 42424243. The next prime is 42424289. The reversal of 42424279 is 97242424.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42424279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42424289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21212139 + 21212140.

It is an arithmetic number, because the mean of its divisors is an integer number (21212140).

Almost surely, 2^42424279 is an apocalyptic number.

42424279 is a deficient number, since it is larger than the sum of its proper divisors (1).

42424279 is an equidigital number, since it uses as much as digits as its factorization.

42424279 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 42424279 is about 6513.3922805248. The cubic root of 42424279 is about 348.7692253547.

The spelling of 42424279 in words is "forty-two million, four hundred twenty-four thousand, two hundred seventy-nine".