42104 has 16 divisors (see below), whose sum is σ = 83400. Its totient is φ = 19872.

The previous prime is 42101. The next prime is 42131. The reversal of 42104 is 40124.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14 + ... + 290.

2⁴²¹⁰⁴ is an apocalyptic number.

It is an amenable number.

42104 is a deficient number, since it is larger than the sum of its proper divisors (41296).

42104 is a wasteful number, since it uses less digits than its factorization.

42104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 298 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 42104 is about 205.1925924589. The cubic root of 42104 is about 34.7889338135.

Adding to 42104 its reverse (40124), we get a palindrome (82228).

The spelling of 42104 in words is "forty-two thousand, one hundred four", and thus it is an iban number.