42508163 has 8 divisors (see below), whose sum is σ = 45301248. Its totient is φ = 39793864.

The previous prime is 42508159. The next prime is 42508181. The reversal of 42508163 is 36180524.

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

It is not a de Polignac number, because 42508163 - 2² = 42508159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42508183) 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, 18581 + ... + 20742.

It is an arithmetic number, because the mean of its divisors is an integer number (5662656).

Almost surely, 2^42508163 is an apocalyptic number.

42508163 is a deficient number, since it is larger than the sum of its proper divisors (2793085).

42508163 is a wasteful number, since it uses less digits than its factorization.

42508163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39393.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 42508163 is about 6519.8284486634. The cubic root of 42508163 is about 348.9989436289.

Adding to 42508163 its reverse (36180524), we get a palindrome (78688687).

The spelling of 42508163 in words is "forty-two million, five hundred eight thousand, one hundred sixty-three".