985121 has 2 divisors, whose sum is σ = 985122. Its totient is φ = 985120.

The previous prime is 985109. The next prime is 985129. The reversal of 985121 is 121589.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 698896 + 286225 = 836^2 + 535^2 .

It is a cyclic number.

It is not a de Polignac number, because 985121 - 2⁶ = 985057 is a prime.

It is not a weakly prime, because it can be changed into another prime (985129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492560 + 492561.

It is an arithmetic number, because the mean of its divisors is an integer number (492561).

2⁹⁸⁵¹²¹ is an apocalyptic number.

It is an amenable number.

985121 is a deficient number, since it is larger than the sum of its proper divisors (1).

985121 is an equidigital number, since it uses as much as digits as its factorization.

985121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 26.

The square root of 985121 is about 992.5326191113. The cubic root of 985121 is about 99.5015529668.

The spelling of 985121 in words is "nine hundred eighty-five thousand, one hundred twenty-one".