42642244 has 6 divisors (see below), whose sum is σ = 74623934. Its totient is φ = 21321120.

The previous prime is 42642179. The next prime is 42642247. The reversal of 42642244 is 44224624.

It can be written as a sum of positive squares in only one way, i.e., 42380100 + 262144 = 6510^2 + 512^2 .

It is not an unprimeable number, because it can be changed into a prime (42642247) 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 as a sum of consecutive naturals, namely, 5330277 + ... + 5330284.

Almost surely, 2^42642244 is an apocalyptic number.

It is an amenable number.

42642244 is a deficient number, since it is larger than the sum of its proper divisors (31981690).

42642244 is a wasteful number, since it uses less digits than its factorization.

42642244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10660565 (or 10660563 counting only the distinct ones).

The product of its digits is 12288, while the sum is 28.

The square root of 42642244 is about 6530.1029088369. The cubic root of 42642244 is about 349.3655007802.

Adding to 42642244 its reverse (44224624), we get a palindrome (86866868).

The spelling of 42642244 in words is "forty-two million, six hundred forty-two thousand, two hundred forty-four".