861426 has 12 divisors (see below), whose sum is σ = 1866462. Its totient is φ = 287136.

The previous prime is 861391. The next prime is 861433. The reversal of 861426 is 624168.

861426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 720801 + 140625 = 849^2 + 375^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 861426.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23911 + ... + 23946.

2⁸⁶¹⁴²⁶ is an apocalyptic number.

861426 is an abundant number, since it is smaller than the sum of its proper divisors (1005036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

861426 is a wasteful number, since it uses less digits than its factorization.

861426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47865 (or 47862 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 861426 is about 928.1303787723. The cubic root of 861426 is about 95.1493863905.

The spelling of 861426 in words is "eight hundred sixty-one thousand, four hundred twenty-six".