916121 has 2 divisors, whose sum is σ = 916122. Its totient is φ = 916120.

The previous prime is 916109. The next prime is 916127. The reversal of 916121 is 121619.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 912025 + 4096 = 955^2 + 64^2 .

It is a cyclic number.

It is not a de Polignac number, because 916121 - 2⁶ = 916057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 916093 and 916102.

It is not a weakly prime, because it can be changed into another prime (916127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 458060 + 458061.

It is an arithmetic number, because the mean of its divisors is an integer number (458061).

2⁹¹⁶¹²¹ is an apocalyptic number.

It is an amenable number.

916121 is a deficient number, since it is larger than the sum of its proper divisors (1).

916121 is an equidigital number, since it uses as much as digits as its factorization.

916121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108, while the sum is 20.

The square root of 916121 is about 957.1421002129. The cubic root of 916121 is about 97.1219990438.

The spelling of 916121 in words is "nine hundred sixteen thousand, one hundred twenty-one".