42104242 has 4 divisors (see below), whose sum is σ = 63156366. Its totient is φ = 21052120.

The previous prime is 42104239. The next prime is 42104243. The reversal of 42104242 is 24240124.

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., 40564161 + 1540081 = 6369^2 + 1241^2 .

It is not an unprimeable number, because it can be changed into a prime (42104243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10526059 + ... + 10526062.

Almost surely, 2^42104242 is an apocalyptic number.

42104242 is a deficient number, since it is larger than the sum of its proper divisors (21052124).

42104242 is a wasteful number, since it uses less digits than its factorization.

42104242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21052123.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 42104242 is about 6488.7781592531. The cubic root of 42104242 is about 347.8900046516.

Adding to 42104242 its reverse (24240124), we get a palindrome (66344366).

The spelling of 42104242 in words is "forty-two million, one hundred four thousand, two hundred forty-two".