4078161 has 16 divisors (see below), whose sum is σ = 6093120. Its totient is φ = 2695680.

The previous prime is 4078159. The next prime is 4078187. The reversal of 4078161 is 1618704.

It is a happy number.

It is not a de Polignac number, because 4078161 - 2¹ = 4078159 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (4078561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2961 + ... + 4113.

It is an arithmetic number, because the mean of its divisors is an integer number (380820).

Almost surely, 2^4078161 is an apocalyptic number.

It is an amenable number.

4078161 is a deficient number, since it is larger than the sum of its proper divisors (2014959).

4078161 is a wasteful number, since it uses less digits than its factorization.

4078161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293 (or 1287 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 4078161 is about 2019.4457160320. The cubic root of 4078161 is about 159.7673833273.

The spelling of 4078161 in words is "four million, seventy-eight thousand, one hundred sixty-one".