42404142 has 16 divisors (see below), whose sum is σ = 92518272. Its totient is φ = 12849720.

The previous prime is 42404113. The next prime is 42404147. The reversal of 42404142 is 24140424.

It is a super-2 number, since 2×42404142² = 3596222517512328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42404147) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 321178 + ... + 321309.

It is an arithmetic number, because the mean of its divisors is an integer number (5782392).

Almost surely, 2^42404142 is an apocalyptic number.

42404142 is an abundant number, since it is smaller than the sum of its proper divisors (50114130).

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

42404142 is a wasteful number, since it uses less digits than its factorization.

42404142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642503.

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 42404142 is about 6511.8462819695. The cubic root of 42404142 is about 348.7140346514.

Adding to 42404142 its reverse (24140424), we get a palindrome (66544566).

The spelling of 42404142 in words is "forty-two million, four hundred four thousand, one hundred forty-two".