42021163 has 4 divisors (see below), whose sum is σ = 42046888. Its totient is φ = 41995440.

The previous prime is 42021143. The next prime is 42021173. The reversal of 42021163 is 36112024.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42021163 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42021163.

It is not an unprimeable number, because it can be changed into a prime (42021143) 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, 10233 + ... + 13738.

It is an arithmetic number, because the mean of its divisors is an integer number (10511722).

Almost surely, 2^42021163 is an apocalyptic number.

42021163 is a deficient number, since it is larger than the sum of its proper divisors (25725).

42021163 is a wasteful number, since it uses less digits than its factorization.

42021163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25724.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 42021163 is about 6482.3732536780. The cubic root of 42021163 is about 347.6610381392.

Adding to 42021163 its reverse (36112024), we get a palindrome (78133187).

The spelling of 42021163 in words is "forty-two million, twenty-one thousand, one hundred sixty-three".