42004441 has 8 divisors (see below), whose sum is σ = 43749000. Its totient is φ = 40279680.

The previous prime is 42004439. The next prime is 42004451. The reversal of 42004441 is 14440024.

It can be written as a sum of positive squares in 4 ways, for example, as 672400 + 41332041 = 820^2 + 6429^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 42004441 - 2¹ = 42004439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42004451) 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, 540 + ... + 9181.

It is an arithmetic number, because the mean of its divisors is an integer number (5468625).

Almost surely, 2^42004441 is an apocalyptic number.

It is an amenable number.

42004441 is a deficient number, since it is larger than the sum of its proper divisors (1744559).

42004441 is a wasteful number, since it uses less digits than its factorization.

42004441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9899.

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

The square root of 42004441 is about 6481.0833199397. The cubic root of 42004441 is about 347.6149156714.

Adding to 42004441 its reverse (14440024), we get a palindrome (56444465).

The spelling of 42004441 in words is "forty-two million, four thousand, four hundred forty-one".