42270979 has 2 divisors, whose sum is σ = 42270980. Its totient is φ = 42270978.

The previous prime is 42270973. The next prime is 42271003. The reversal of 42270979 is 97907224.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42270979 - 2⁵ = 42270947 is a prime.

It is not a weakly prime, because it can be changed into another prime (42270973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21135489 + 21135490.

It is an arithmetic number, because the mean of its divisors is an integer number (21135490).

Almost surely, 2^42270979 is an apocalyptic number.

42270979 is a deficient number, since it is larger than the sum of its proper divisors (1).

42270979 is an equidigital number, since it uses as much as digits as its factorization.

42270979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 42270979 is about 6501.6135689535. The cubic root of 42270979 is about 348.3486261661.

The spelling of 42270979 in words is "forty-two million, two hundred seventy thousand, nine hundred seventy-nine".