42020042 has 8 divisors (see below), whose sum is σ = 63058656. Its totient is φ = 21000492.

The previous prime is 42020029. The next prime is 42020059. The reversal of 42020042 is 24002024.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 42019999 and 42020026.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3893 + ... + 9959.

It is an arithmetic number, because the mean of its divisors is an integer number (7882332).

Almost surely, 2^42020042 is an apocalyptic number.

42020042 is a deficient number, since it is larger than the sum of its proper divisors (21038614).

42020042 is a wasteful number, since it uses less digits than its factorization.

42020042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9532.

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 42020042 is about 6482.2867878550. The cubic root of 42020042 is about 347.6579465899.

Adding to 42020042 its reverse (24002024), we get a palindrome (66022066).

The spelling of 42020042 in words is "forty-two million, twenty thousand, forty-two".