42421163 has 4 divisors (see below), whose sum is σ = 42537120. Its totient is φ = 42305208.

The previous prime is 42421133. The next prime is 42421187. The reversal of 42421163 is 36112424.

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

It is a cyclic number.

It is not a de Polignac number, because 42421163 - 2²⁰ = 41372587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42421123) 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, 57428 + ... + 58161.

It is an arithmetic number, because the mean of its divisors is an integer number (10634280).

Almost surely, 2^42421163 is an apocalyptic number.

42421163 is a deficient number, since it is larger than the sum of its proper divisors (115957).

42421163 is a wasteful number, since it uses less digits than its factorization.

42421163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115956.

The product of its digits is 1152, while the sum is 23.

The square root of 42421163 is about 6513.1530766596. The cubic root of 42421163 is about 348.7606862859.

Adding to 42421163 its reverse (36112424), we get a palindrome (78533587).

The spelling of 42421163 in words is "forty-two million, four hundred twenty-one thousand, one hundred sixty-three".