870281 has 4 divisors (see below), whose sum is σ = 921492. Its totient is φ = 819072.

The previous prime is 870271. The next prime is 870283. The reversal of 870281 is 182078.

870281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 292681 + 577600 = 541^2 + 760^2 .

It is a cyclic number.

It is not a de Polignac number, because 870281 - 2¹⁰ = 869257 is a prime.

It is a super-2 number, since 2×870281² = 1514778037922, 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 870281.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 870281.

It is not an unprimeable number, because it can be changed into a prime (870283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25580 + ... + 25613.

It is an arithmetic number, because the mean of its divisors is an integer number (230373).

2⁸⁷⁰²⁸¹ is an apocalyptic number.

It is an amenable number.

870281 is a deficient number, since it is larger than the sum of its proper divisors (51211).

870281 is a wasteful number, since it uses less digits than its factorization.

870281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51210.

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 870281 is about 932.8885249589. Note that the first 3 decimals coincide. The cubic root of 870281 is about 95.4743039151.

The spelling of 870281 in words is "eight hundred seventy thousand, two hundred eighty-one".