858985241 has 2 divisors, whose sum is σ = 858985242. Its totient is φ = 858985240.

The previous prime is 858985217. The next prime is 858985313. The reversal of 858985241 is 142589858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 708677641 + 150307600 = 26621^2 + 12260^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-858985241 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 858985241.

It is not a weakly prime, because it can be changed into another prime (858985441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429492620 + 429492621.

It is an arithmetic number, because the mean of its divisors is an integer number (429492621).

Almost surely, 2^858985241 is an apocalyptic number.

It is an amenable number.

858985241 is a deficient number, since it is larger than the sum of its proper divisors (1).

858985241 is an equidigital number, since it uses as much as digits as its factorization.

858985241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 921600, while the sum is 50.

The square root of 858985241 is about 29308.4499931334. The cubic root of 858985241 is about 950.5943615818.

The spelling of 858985241 in words is "eight hundred fifty-eight million, nine hundred eighty-five thousand, two hundred forty-one".