42009441 has 8 divisors (see below), whose sum is σ = 56454144. Its totient is φ = 27785520.

The previous prime is 42009427. The next prime is 42009491. The reversal of 42009441 is 14490024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42009441 - 2¹¹ = 42007393 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (42009421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54750 + ... + 55511.

It is an arithmetic number, because the mean of its divisors is an integer number (7056768).

Almost surely, 2^42009441 is an apocalyptic number.

It is an amenable number.

42009441 is a deficient number, since it is larger than the sum of its proper divisors (14444703).

42009441 is a wasteful number, since it uses less digits than its factorization.

42009441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110391.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 42009441 is about 6481.4690464431. The cubic root of 42009441 is about 347.6287079084.

Adding to 42009441 its reverse (14490024), we get a palindrome (56499465).

The spelling of 42009441 in words is "forty-two million, nine thousand, four hundred forty-one".