985129 has 2 divisors, whose sum is σ = 985130. Its totient is φ = 985128.

The previous prime is 985121. The next prime is 985151. The reversal of 985129 is 921589.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 522729 + 462400 = 723^2 + 680^2 .

It is an emirp because it is prime and its reverse (921589) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 985129 - 2³ = 985121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 985094 and 985103.

It is not a weakly prime, because it can be changed into another prime (985121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492564 + 492565.

It is an arithmetic number, because the mean of its divisors is an integer number (492565).

2⁹⁸⁵¹²⁹ is an apocalyptic number.

It is an amenable number.

985129 is a deficient number, since it is larger than the sum of its proper divisors (1).

985129 is an equidigital number, since it uses as much as digits as its factorization.

985129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 34.

The square root of 985129 is about 992.5366491974. The cubic root of 985129 is about 99.5018223112.

The spelling of 985129 in words is "nine hundred eighty-five thousand, one hundred twenty-nine".