42022144 has 18 divisors (see below), whose sum is σ = 83880650. Its totient is φ = 21010944.

The previous prime is 42022111. The next prime is 42022159. The reversal of 42022144 is 44122024.

It can be written as a sum of positive squares in only one way, i.e., 37356544 + 4665600 = 6112^2 + 2160^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81819 + ... + 82330.

Almost surely, 2^42022144 is an apocalyptic number.

It is an amenable number.

42022144 is a deficient number, since it is larger than the sum of its proper divisors (41858506).

42022144 is an equidigital number, since it uses as much as digits as its factorization.

42022144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164165 (or 164151 counting only the distinct ones).

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

The square root of 42022144 is about 6482.4489199684. The cubic root of 42022144 is about 347.6637435444.

Adding to 42022144 its reverse (44122024), we get a palindrome (86144168).

The spelling of 42022144 in words is "forty-two million, twenty-two thousand, one hundred forty-four".