42221105 has 8 divisors (see below), whose sum is σ = 50744232. Its totient is φ = 33724288.

The previous prime is 42221063. The next prime is 42221117. The reversal of 42221105 is 50112224.

It can be written as a sum of positive squares in 4 ways, for example, as 20802721 + 21418384 = 4561^2 + 4628^2 .

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 42221105 - 2¹⁰ = 42220081 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2852 + ... + 9621.

It is an arithmetic number, because the mean of its divisors is an integer number (6343029).

Almost surely, 2^42221105 is an apocalyptic number.

It is an amenable number.

42221105 is a deficient number, since it is larger than the sum of its proper divisors (8523127).

42221105 is a wasteful number, since it uses less digits than its factorization.

42221105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13155.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 42221105 is about 6497.7769275345. The cubic root of 42221105 is about 348.2115709328.

Adding to 42221105 its reverse (50112224), we get a palindrome (92333329).

It can be divided in two parts, 422 and 21105, that multiplied together give a triangular number (8906310 = T₄₂₂₀).

The spelling of 42221105 in words is "forty-two million, two hundred twenty-one thousand, one hundred five".