879021 has 24 divisors (see below), whose sum is σ = 1493856. Its totient is φ = 491040.

The previous prime is 879007. The next prime is 879023. The reversal of 879021 is 120978.

It is not a de Polignac number, because 879021 - 2⁵ = 878989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (879023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 946 + ... + 1628.

It is an arithmetic number, because the mean of its divisors is an integer number (62244).

2⁸⁷⁹⁰²¹ is an apocalyptic number.

It is an amenable number.

879021 is a deficient number, since it is larger than the sum of its proper divisors (614835).

879021 is a wasteful number, since it uses less digits than its factorization.

879021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713 (or 710 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 879021 is about 937.5611980026. The cubic root of 879021 is about 95.7928475911.

Adding to 879021 its reverse (120978), we get a palindrome (999999).

The spelling of 879021 in words is "eight hundred seventy-nine thousand, twenty-one".