876821121 has 96 divisors (see below), whose sum is σ = 1525620096. Its totient is φ = 479232000.

The previous prime is 876821089. The next prime is 876821129. The reversal of 876821121 is 121128678.

It is not a de Polignac number, because 876821121 - 2⁵ = 876821089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (876821129) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6693226 + ... + 6693356.

It is an arithmetic number, because the mean of its divisors is an integer number (15891876).

Almost surely, 2^876821121 is an apocalyptic number.

It is an amenable number.

876821121 is a deficient number, since it is larger than the sum of its proper divisors (648798975).

876821121 is a wasteful number, since it uses less digits than its factorization.

876821121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303 (or 300 counting only the distinct ones).

The product of its digits is 10752, while the sum is 36.

The square root of 876821121 is about 29611.1654785826. The cubic root of 876821121 is about 957.1286895006.

Adding to 876821121 its reverse (121128678), we get a palindrome (997949799).

The spelling of 876821121 in words is "eight hundred seventy-six million, eight hundred twenty-one thousand, one hundred twenty-one".