42443541 has 16 divisors (see below), whose sum is σ = 71862400. Its totient is φ = 24253344.

The previous prime is 42443503. The next prime is 42443561. The reversal of 42443541 is 14534424.

It is a happy number.

It is not a de Polignac number, because 42443541 - 2⁷ = 42443413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42443561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112096 + ... + 112473.

It is an arithmetic number, because the mean of its divisors is an integer number (4491400).

Almost surely, 2^42443541 is an apocalyptic number.

It is an amenable number.

42443541 is a deficient number, since it is larger than the sum of its proper divisors (29418859).

42443541 is a wasteful number, since it uses less digits than its factorization.

42443541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224585 (or 224579 counting only the distinct ones).

The product of its digits is 7680, while the sum is 27.

The square root of 42443541 is about 6514.8707585032. The cubic root of 42443541 is about 348.8220015519.

Adding to 42443541 its reverse (14534424), we get a palindrome (56977965).

The spelling of 42443541 in words is "forty-two million, four hundred forty-three thousand, five hundred forty-one".