4878161 has 4 divisors (see below), whose sum is σ = 4884132. Its totient is φ = 4872192.

The previous prime is 4878151. The next prime is 4878163. The reversal of 4878161 is 1618784.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3330625 + 1547536 = 1825^2 + 1244^2 .

It is a cyclic number.

It is not a de Polignac number, because 4878161 - 2²² = 683857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4878163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1520 + ... + 3473.

It is an arithmetic number, because the mean of its divisors is an integer number (1221033).

Almost surely, 2^4878161 is an apocalyptic number.

It is an amenable number.

4878161 is a deficient number, since it is larger than the sum of its proper divisors (5971).

4878161 is an equidigital number, since it uses as much as digits as its factorization.

4878161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5970.

The product of its digits is 10752, while the sum is 35.

The square root of 4878161 is about 2208.6559261234. The cubic root of 4878161 is about 169.5972125039.

Subtracting from 4878161 its sum of digits (35), we obtain a triangular number (4878126 = T₃₁₂₃).

The spelling of 4878161 in words is "four million, eight hundred seventy-eight thousand, one hundred sixty-one".