42143444 has 48 divisors (see below), whose sum is σ = 91163520. Its totient is φ = 16640640.

The previous prime is 42143441. The next prime is 42143447. The reversal of 42143444 is 44434124.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42143441) and next prime (42143447).

It is a super-2 number, since 2×42143444² = 3552139744362272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42143441) 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 15 ways as a sum of consecutive naturals, for example, 18614 + ... + 20754.

It is an arithmetic number, because the mean of its divisors is an integer number (1899240).

Almost surely, 2^42143444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42143444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45581760).

42143444 is an abundant number, since it is smaller than the sum of its proper divisors (49020076).

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

42143444 is a wasteful number, since it uses less digits than its factorization.

42143444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2208 (or 2206 counting only the distinct ones).

The product of its digits is 6144, while the sum is 26.

The square root of 42143444 is about 6491.7982100494. The cubic root of 42143444 is about 347.9979411513.

Adding to 42143444 its reverse (44434124), we get a palindrome (86577568).

The spelling of 42143444 in words is "forty-two million, one hundred forty-three thousand, four hundred forty-four".