861283 has 4 divisors (see below), whose sum is σ = 863248. Its totient is φ = 859320.

The previous prime is 861239. The next prime is 861293. The reversal of 861283 is 382168.

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

It is a cyclic number.

It is not a de Polignac number, because 861283 - 2¹³ = 853091 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (861293) 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, 10 + ... + 1312.

It is an arithmetic number, because the mean of its divisors is an integer number (215812).

2⁸⁶¹²⁸³ is an apocalyptic number.

861283 is a deficient number, since it is larger than the sum of its proper divisors (1965).

861283 is a wasteful number, since it uses less digits than its factorization.

861283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1964.

The product of its digits is 2304, while the sum is 28.

The square root of 861283 is about 928.0533389843. The cubic root of 861283 is about 95.1441210455.

It can be divided in two parts, 86 and 1283, that added together give a square (1369 = 37²).

The spelling of 861283 in words is "eight hundred sixty-one thousand, two hundred eighty-three".