850247281 has 9 divisors (see below), whose sum is σ = 921092619. Its totient is φ = 784493736.

The previous prime is 850247243. The next prime is 850247287. The reversal of 850247281 is 182742058.

The square root of 850247281 is 29159.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 125776225 + 724471056 = 11215^2 + 26916^2 .

It is not a de Polignac number, because 850247281 - 2¹¹ = 850245233 is a prime.

It is a super-2 number, since 2×850247281² = 1445840877695785922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 850247281.

It is not an unprimeable number, because it can be changed into a prime (850247287) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 377946 + ... + 380188.

Almost surely, 2^850247281 is an apocalyptic number.

850247281 is the 29159-th square number.

850247281 is the 14580-th centered octagonal number.

It is an amenable number.

850247281 is a deficient number, since it is larger than the sum of its proper divisors (70845338).

850247281 is an frugal number, since it uses more digits than its factorization.

850247281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4512 (or 2256 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 37.

The cubic root of 850247281 is about 947.3600876665.

The spelling of 850247281 in words is "eight hundred fifty million, two hundred forty-seven thousand, two hundred eighty-one".