42001441 has 4 divisors (see below), whose sum is σ = 44472132. Its totient is φ = 39530752.

The previous prime is 42001397. The next prime is 42001447. The reversal of 42001441 is 14410024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22287841 + 19713600 = 4721^2 + 4440^2 .

It is a cyclic number.

It is not a de Polignac number, because 42001441 - 2¹¹ = 41999393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42001447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1235320 + ... + 1235353.

It is an arithmetic number, because the mean of its divisors is an integer number (11118033).

Almost surely, 2^42001441 is an apocalyptic number.

It is an amenable number.

42001441 is a deficient number, since it is larger than the sum of its proper divisors (2470691).

42001441 is a wasteful number, since it uses less digits than its factorization.

42001441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2470690.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 42001441 is about 6480.8518730179. The cubic root of 42001441 is about 347.6066398038.

Adding to 42001441 its reverse (14410024), we get a palindrome (56411465).

The spelling of 42001441 in words is "forty-two million, one thousand, four hundred forty-one".