877121 has 4 divisors (see below), whose sum is σ = 1002432. Its totient is φ = 751812.

The previous prime is 877117. The next prime is 877133. The reversal of 877121 is 121778.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121778 = 2 ⋅60889.

It is a cyclic number.

It is not a de Polignac number, because 877121 - 2² = 877117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (877111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62645 + ... + 62658.

It is an arithmetic number, because the mean of its divisors is an integer number (250608).

2⁸⁷⁷¹²¹ is an apocalyptic number.

It is an amenable number.

877121 is a deficient number, since it is larger than the sum of its proper divisors (125311).

877121 is a wasteful number, since it uses less digits than its factorization.

877121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125310.

The product of its digits is 784, while the sum is 26.

The square root of 877121 is about 936.5473826775. The cubic root of 877121 is about 95.7237791982.

Adding to 877121 its reverse (121778), we get a palindrome (998899).

The spelling of 877121 in words is "eight hundred seventy-seven thousand, one hundred twenty-one".