877221 has 12 divisors (see below), whose sum is σ = 1311180. Its totient is φ = 564480.

The previous prime is 877213. The next prime is 877223. The reversal of 877221 is 122778.

877221 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 2 ways, for example, as 562500 + 314721 = 750^2 + 561^2 .

It is not a de Polignac number, because 877221 - 2³ = 877213 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

877221 is a lucky number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (877223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1420 + ... + 1941.

It is an arithmetic number, because the mean of its divisors is an integer number (109265).

2⁸⁷⁷²²¹ is an apocalyptic number.

It is an amenable number.

877221 is a deficient number, since it is larger than the sum of its proper divisors (433959).

877221 is a wasteful number, since it uses less digits than its factorization.

877221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3396 (or 3393 counting only the distinct ones).

The product of its digits is 1568, while the sum is 27.

The square root of 877221 is about 936.6007687377. The cubic root of 877221 is about 95.7274168621.

Adding to 877221 its reverse (122778), we get a palindrome (999999).

The spelling of 877221 in words is "eight hundred seventy-seven thousand, two hundred twenty-one".