861234 has 16 divisors (see below), whose sum is σ = 1879200. Its totient is φ = 260960.

The previous prime is 861221. The next prime is 861239. The reversal of 861234 is 432168.

It is a happy number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (861239) 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, 6459 + ... + 6590.

It is an arithmetic number, because the mean of its divisors is an integer number (117450).

2⁸⁶¹²³⁴ is an apocalyptic number.

861234 is an abundant number, since it is smaller than the sum of its proper divisors (1017966).

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

861234 is a wasteful number, since it uses less digits than its factorization.

861234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13065.

The product of its digits is 1152, while the sum is 24.

The square root of 861234 is about 928.0269392642. The cubic root of 861234 is about 95.1423167023.

It can be divided in two parts, 8612 and 34, that added together give a triangular number (8646 = T₁₃₁).

The spelling of 861234 in words is "eight hundred sixty-one thousand, two hundred thirty-four".