861263 has 8 divisors (see below), whose sum is σ = 938448. Its totient is φ = 785664.

The previous prime is 861239. The next prime is 861293. The reversal of 861263 is 362168.

861263 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 861263 - 2⁶ = 861199 is a prime.

It is a Duffinian number.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 920 + ... + 1602.

It is an arithmetic number, because the mean of its divisors is an integer number (117306).

2⁸⁶¹²⁶³ is an apocalyptic number.

861263 is a deficient number, since it is larger than the sum of its proper divisors (77185).

861263 is a wasteful number, since it uses less digits than its factorization.

861263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793.

The product of its digits is 1728, while the sum is 26.

The square root of 861263 is about 928.0425636791. The cubic root of 861263 is about 95.1433845872.

The spelling of 861263 in words is "eight hundred sixty-one thousand, two hundred sixty-three".