878545 has 4 divisors (see below), whose sum is σ = 1054260. Its totient is φ = 702832.

The previous prime is 878539. The next prime is 878551. The reversal of 878545 is 545878.

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

It is an interprime number because it is at equal distance from previous prime (878539) and next prime (878551).

It can be written as a sum of positive squares in 2 ways, for example, as 294849 + 583696 = 543^2 + 764^2 .

It is a cyclic number.

It is not a de Polignac number, because 878545 - 2⁵ = 878513 is a prime.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87850 + ... + 87859.

It is an arithmetic number, because the mean of its divisors is an integer number (263565).

2⁸⁷⁸⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

878545 is a deficient number, since it is larger than the sum of its proper divisors (175715).

878545 is a wasteful number, since it uses less digits than its factorization.

878545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175714.

The product of its digits is 44800, while the sum is 37.

The square root of 878545 is about 937.3073135317. The cubic root of 878545 is about 95.7755534922.

The spelling of 878545 in words is "eight hundred seventy-eight thousand, five hundred forty-five".