878129 has 6 divisors (see below), whose sum is σ = 1021554. Its totient is φ = 752640.

The previous prime is 878113. The next prime is 878131. The reversal of 878129 is 921878.

It is a happy number.

878129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 490000 + 388129 = 700^2 + 623^2 .

It is not a de Polignac number, because 878129 - 2⁴ = 878113 is a prime.

It is a super-2 number, since 2×878129² = 1542221081282, which contains 22 as substring.

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

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 878129.

It is not an unprimeable number, because it can be changed into a prime (878159) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8912 + ... + 9009.

It is an arithmetic number, because the mean of its divisors is an integer number (170259).

2⁸⁷⁸¹²⁹ is an apocalyptic number.

It is an amenable number.

878129 is a deficient number, since it is larger than the sum of its proper divisors (143425).

878129 is a wasteful number, since it uses less digits than its factorization.

878129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17935 (or 17928 counting only the distinct ones).

The product of its digits is 8064, while the sum is 35.

The square root of 878129 is about 937.0853749792. The cubic root of 878129 is about 95.7604342057.

The spelling of 878129 in words is "eight hundred seventy-eight thousand, one hundred twenty-nine".