42005142 has 40 divisors (see below), whose sum is σ = 94507776. Its totient is φ = 13944528.

The previous prime is 42005081. The next prime is 42005167. The reversal of 42005142 is 24150024.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 19 ways as a sum of consecutive naturals, for example, 61708 + ... + 62384.

Almost surely, 2^42005142 is an apocalyptic number.

42005142 is an abundant number, since it is smaller than the sum of its proper divisors (52502634).

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

42005142 is a wasteful number, since it uses less digits than its factorization.

42005142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074 (or 1065 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 42005142 is about 6481.1374001791. The cubic root of 42005142 is about 347.6168494090.

Adding to 42005142 its reverse (24150024), we get a palindrome (66155166).

The spelling of 42005142 in words is "forty-two million, five thousand, one hundred forty-two".