42004839 has 8 divisors (see below), whose sum is σ = 58954240. Its totient is φ = 26529336.

The previous prime is 42004813. The next prime is 42004843. The reversal of 42004839 is 93840024.

It is a happy number.

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

It is not a de Polignac number, because 42004839 - 2¹¹ = 42002791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42004439) 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, 368407 + ... + 368520.

It is an arithmetic number, because the mean of its divisors is an integer number (7369280).

Almost surely, 2^42004839 is an apocalyptic number.

42004839 is a deficient number, since it is larger than the sum of its proper divisors (16949401).

42004839 is a wasteful number, since it uses less digits than its factorization.

42004839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736949.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 42004839 is about 6481.1140246103. The cubic root of 42004839 is about 347.6160135736.

The spelling of 42004839 in words is "forty-two million, four thousand, eight hundred thirty-nine".