873121 has 2 divisors, whose sum is σ = 873122. Its totient is φ = 873120.

The previous prime is 873113. The next prime is 873133. The reversal of 873121 is 121378.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 555025 + 318096 = 745^2 + 564^2 .

It is a cyclic number.

It is not a de Polignac number, because 873121 - 2³ = 873113 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 873092 and 873101.

It is not a weakly prime, because it can be changed into another prime (873421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436560 + 436561.

It is an arithmetic number, because the mean of its divisors is an integer number (436561).

2⁸⁷³¹²¹ is an apocalyptic number.

It is an amenable number.

873121 is a deficient number, since it is larger than the sum of its proper divisors (1).

873121 is an equidigital number, since it uses as much as digits as its factorization.

873121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 22.

The square root of 873121 is about 934.4094391647. The cubic root of 873121 is about 95.5780453544.

Adding to 873121 its reverse (121378), we get a palindrome (994499).

The spelling of 873121 in words is "eight hundred seventy-three thousand, one hundred twenty-one".