42104434 has 4 divisors (see below), whose sum is σ = 63156654. Its totient is φ = 21052216.

The previous prime is 42104431. The next prime is 42104441. The reversal of 42104434 is 43440124.

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

It can be written as a sum of positive squares in only one way, i.e., 38875225 + 3229209 = 6235^2 + 1797^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (42104431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10526107 + ... + 10526110.

Almost surely, 2^42104434 is an apocalyptic number.

42104434 is a deficient number, since it is larger than the sum of its proper divisors (21052220).

42104434 is a wasteful number, since it uses less digits than its factorization.

42104434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21052219.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 42104434 is about 6488.7929540092. The cubic root of 42104434 is about 347.8905334565.

Adding to 42104434 its reverse (43440124), we get a palindrome (85544558).

The spelling of 42104434 in words is "forty-two million, one hundred four thousand, four hundred thirty-four".