4022145 has 12 divisors (see below), whose sum is σ = 6971796. Its totient is φ = 2145120.

The previous prime is 4022143. The next prime is 4022147. The reversal of 4022145 is 5412204.

It is an interprime number because it is at equal distance from previous prime (4022143) and next prime (4022147).

It can be written as a sum of positive squares in 2 ways, for example, as 651249 + 3370896 = 807^2 + 1836^2 .

It is not a de Polignac number, because 4022145 - 2¹ = 4022143 is a prime.

It is a Curzon number.

4022145 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4022143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44646 + ... + 44735.

It is an arithmetic number, because the mean of its divisors is an integer number (580983).

Almost surely, 2^4022145 is an apocalyptic number.

4022145 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4022145 is a deficient number, since it is larger than the sum of its proper divisors (2949651).

4022145 is a wasteful number, since it uses less digits than its factorization.

4022145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89392 (or 89389 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 4022145 is about 2005.5286086217. The cubic root of 4022145 is about 159.0325078898.

Adding to 4022145 its reverse (5412204), we get a palindrome (9434349).

The spelling of 4022145 in words is "four million, twenty-two thousand, one hundred forty-five".