42405779 has 8 divisors (see below), whose sum is σ = 46219152. Its totient is φ = 38671200.

The previous prime is 42405763. The next prime is 42405787. The reversal of 42405779 is 97750424.

42405779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42405779 - 2⁴ = 42405763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42405709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18572 + ... + 20729.

It is an arithmetic number, because the mean of its divisors is an integer number (5777394).

Almost surely, 2^42405779 is an apocalyptic number.

42405779 is a deficient number, since it is larger than the sum of its proper divisors (3813373).

42405779 is a wasteful number, since it uses less digits than its factorization.

42405779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39397.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 42405779 is about 6511.9719747554. The cubic root of 42405779 is about 348.7185219295.

The spelling of 42405779 in words is "forty-two million, four hundred five thousand, seven hundred seventy-nine".