42442979 has 8 divisors (see below), whose sum is σ = 46218000. Its totient is φ = 38822112.

The previous prime is 42442969. The next prime is 42442993. The reversal of 42442979 is 97924424.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42442979 - 2⁸ = 42442723 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (42442949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37964 + ... + 39065.

It is an arithmetic number, because the mean of its divisors is an integer number (5777250).

Almost surely, 2^42442979 is an apocalyptic number.

42442979 is a deficient number, since it is larger than the sum of its proper divisors (3775021).

42442979 is a wasteful number, since it uses less digits than its factorization.

42442979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77077.

The product of its digits is 145152, while the sum is 41.

The square root of 42442979 is about 6514.8276262692. The cubic root of 42442979 is about 348.8204619472.

The spelling of 42442979 in words is "forty-two million, four hundred forty-two thousand, nine hundred seventy-nine".