42004542 has 8 divisors (see below), whose sum is σ = 84009096. Its totient is φ = 14001512.

The previous prime is 42004531. The next prime is 42004553. The reversal of 42004542 is 24540024.

It is an interprime number because it is at equal distance from previous prime (42004531) and next prime (42004553).

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

42004542 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3500373 + ... + 3500384.

It is an arithmetic number, because the mean of its divisors is an integer number (10501137).

Almost surely, 2^42004542 is an apocalyptic number.

42004542 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42004542 is a wasteful number, since it uses less digits than its factorization.

42004542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7000762.

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 42004542 is about 6481.0911118422. The cubic root of 42004542 is about 347.6151942854.

Adding to 42004542 its reverse (24540024), we get a palindrome (66544566).

The spelling of 42004542 in words is "forty-two million, four thousand, five hundred forty-two".