42117241 has 4 divisors (see below), whose sum is σ = 42135652. Its totient is φ = 42098832.

The previous prime is 42117239. The next prime is 42117259. The reversal of 42117241 is 14271124.

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 2238016 + 39879225 = 1496^2 + 6315^2 .

It is a cyclic number.

It is not a de Polignac number, because 42117241 - 2¹ = 42117239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42117841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5190 + ... + 10543.

It is an arithmetic number, because the mean of its divisors is an integer number (10533913).

Almost surely, 2^42117241 is an apocalyptic number.

It is an amenable number.

42117241 is a deficient number, since it is larger than the sum of its proper divisors (18411).

42117241 is a wasteful number, since it uses less digits than its factorization.

42117241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18410.

The product of its digits is 448, while the sum is 22.

The square root of 42117241 is about 6489.7797343207. The cubic root of 42117241 is about 347.9258027617.

Adding to 42117241 its reverse (14271124), we get a palindrome (56388365).

The spelling of 42117241 in words is "forty-two million, one hundred seventeen thousand, two hundred forty-one".