42258779 has 2 divisors, whose sum is σ = 42258780. Its totient is φ = 42258778.

The previous prime is 42258763. The next prime is 42258791. The reversal of 42258779 is 97785224.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42258779 - 2⁴ = 42258763 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42258739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21129389 + 21129390.

It is an arithmetic number, because the mean of its divisors is an integer number (21129390).

Almost surely, 2^42258779 is an apocalyptic number.

42258779 is a deficient number, since it is larger than the sum of its proper divisors (1).

42258779 is an equidigital number, since it uses as much as digits as its factorization.

42258779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 44.

The square root of 42258779 is about 6500.6752726159. The cubic root of 42258779 is about 348.3151101680.

The spelling of 42258779 in words is "forty-two million, two hundred fifty-eight thousand, seven hundred seventy-nine".