42245979 has 12 divisors (see below), whose sum is σ = 57199464. Its totient is φ = 27734784.

The previous prime is 42245941. The next prime is 42245989. The reversal of 42245979 is 97954224.

It is not a de Polignac number, because 42245979 - 2¹⁶ = 42180443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42245979.

It is not an unprimeable number, because it can be changed into a prime (42245989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11899 + ... + 15035.

It is an arithmetic number, because the mean of its divisors is an integer number (4766622).

Almost surely, 2^42245979 is an apocalyptic number.

42245979 is a deficient number, since it is larger than the sum of its proper divisors (14953485).

42245979 is an equidigital number, since it uses as much as digits as its factorization.

42245979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3274 (or 3207 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 42245979 is about 6499.6906849480. The cubic root of 42245979 is about 348.2799389070.

The spelling of 42245979 in words is "forty-two million, two hundred forty-five thousand, nine hundred seventy-nine".