878161 has 4 divisors (see below), whose sum is σ = 924400. Its totient is φ = 831924.

The previous prime is 878159. The next prime is 878167. The reversal of 878161 is 161878.

878161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 878161 - 2¹ = 878159 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (878167) 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, 23091 + ... + 23128.

It is an arithmetic number, because the mean of its divisors is an integer number (231100).

2⁸⁷⁸¹⁶¹ is an apocalyptic number.

It is an amenable number.

878161 is a deficient number, since it is larger than the sum of its proper divisors (46239).

878161 is a wasteful number, since it uses less digits than its factorization.

878161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46238.

The product of its digits is 2688, while the sum is 31.

The square root of 878161 is about 937.1024490417. The cubic root of 878161 is about 95.7615973972.

The spelling of 878161 in words is "eight hundred seventy-eight thousand, one hundred sixty-one".