42342779 has 4 divisors (see below), whose sum is σ = 42357120. Its totient is φ = 42328440.

The previous prime is 42342761. The next prime is 42342799. The reversal of 42342779 is 97724324.

42342779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42342779 - 2¹² = 42338683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42342749) 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 3 ways as a sum of consecutive naturals, for example, 932 + ... + 9249.

It is an arithmetic number, because the mean of its divisors is an integer number (10589280).

Almost surely, 2^42342779 is an apocalyptic number.

42342779 is a deficient number, since it is larger than the sum of its proper divisors (14341).

42342779 is a wasteful number, since it uses less digits than its factorization.

42342779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14340.

The product of its digits is 84672, while the sum is 38.

The square root of 42342779 is about 6507.1329324058. The cubic root of 42342779 is about 348.5457455146.

The spelling of 42342779 in words is "forty-two million, three hundred forty-two thousand, seven hundred seventy-nine".