4022161 has 12 divisors (see below), whose sum is σ = 4762996. Its totient is φ = 3373920.

The previous prime is 4022153. The next prime is 4022173. The reversal of 4022161 is 1612204.

It can be written as a sum of positive squares in 2 ways, for example, as 1115136 + 2907025 = 1056^2 + 1705^2 .

It is not a de Polignac number, because 4022161 - 2³ = 4022153 is a prime.

It is a Duffinian number.

4022161 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4022101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 295 + ... + 2851.

Almost surely, 2^4022161 is an apocalyptic number.

It is an amenable number.

4022161 is a deficient number, since it is larger than the sum of its proper divisors (740835).

4022161 is a wasteful number, since it uses less digits than its factorization.

4022161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2592 (or 2581 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 4022161 is about 2005.5325975910. The cubic root of 4022161 is about 159.0327187655.

Adding to 4022161 its reverse (1612204), we get a palindrome (5634365).

It can be divided in two parts, 40 and 22161, that added together give a square (22201 = 149²).

The spelling of 4022161 in words is "four million, twenty-two thousand, one hundred sixty-one".