4178161 has 4 divisors (see below), whose sum is σ = 4499572. Its totient is φ = 3856752.

The previous prime is 4178131. The next prime is 4178171. The reversal of 4178161 is 1618714.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1618714 = 2 ⋅809357.

It can be written as a sum of positive squares in 2 ways, for example, as 640000 + 3538161 = 800^2 + 1881^2 .

It is a cyclic number.

It is not a de Polignac number, because 4178161 - 2⁵ = 4178129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4178101) 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 3 ways as a sum of consecutive naturals, for example, 160686 + ... + 160711.

It is an arithmetic number, because the mean of its divisors is an integer number (1124893).

Almost surely, 2^4178161 is an apocalyptic number.

It is an amenable number.

4178161 is a deficient number, since it is larger than the sum of its proper divisors (321411).

4178161 is a wasteful number, since it uses less digits than its factorization.

4178161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321410.

The product of its digits is 1344, while the sum is 28.

The square root of 4178161 is about 2044.0550383979. The cubic root of 4178161 is about 161.0627303358.

The spelling of 4178161 in words is "four million, one hundred seventy-eight thousand, one hundred sixty-one".