42108161 has 8 divisors (see below), whose sum is σ = 44557920. Its totient is φ = 39681792.

The previous prime is 42108149. The next prime is 42108163. The reversal of 42108161 is 16180124.

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 42108161 - 2²² = 37913857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42108163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2075 + ... + 9408.

It is an arithmetic number, because the mean of its divisors is an integer number (5569740).

Almost surely, 2^42108161 is an apocalyptic number.

It is an amenable number.

42108161 is a deficient number, since it is larger than the sum of its proper divisors (2449759).

42108161 is a wasteful number, since it uses less digits than its factorization.

42108161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11695.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 42108161 is about 6489.0801351193. The cubic root of 42108161 is about 347.9007980109.

Adding to 42108161 its reverse (16180124), we get a palindrome (58288285).

The spelling of 42108161 in words is "forty-two million, one hundred eight thousand, one hundred sixty-one".