42021441 has 24 divisors (see below), whose sum is σ = 75676224. Its totient is φ = 21828960.

The previous prime is 42021401. The next prime is 42021509. The reversal of 42021441 is 14412024.

It is not a de Polignac number, because 42021441 - 2⁷ = 42021313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42021401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29626 + ... + 31011.

It is an arithmetic number, because the mean of its divisors is an integer number (3153176).

Almost surely, 2^42021441 is an apocalyptic number.

It is an amenable number.

42021441 is a deficient number, since it is larger than the sum of its proper divisors (33654783).

42021441 is a wasteful number, since it uses less digits than its factorization.

42021441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60661 (or 60658 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 42021441 is about 6482.3946964066. The cubic root of 42021441 is about 347.6618048128.

Adding to 42021441 its reverse (14412024), we get a palindrome (56433465).

The spelling of 42021441 in words is "forty-two million, twenty-one thousand, four hundred forty-one".