861522 has 16 divisors (see below), whose sum is σ = 1737120. Its totient is φ = 284832.

The previous prime is 861499. The next prime is 861541. The reversal of 861522 is 225168.

It is a junction number, because it is equal to n+sod(n) for n = 861492 and 861501.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318 + ... + 1350.

It is an arithmetic number, because the mean of its divisors is an integer number (108570).

2⁸⁶¹⁵²² is an apocalyptic number.

861522 is an abundant number, since it is smaller than the sum of its proper divisors (875598).

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

861522 is a wasteful number, since it uses less digits than its factorization.

861522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177.

The product of its digits is 960, while the sum is 24.

The square root of 861522 is about 928.1820942035. The cubic root of 861522 is about 95.1529208407.

The spelling of 861522 in words is "eight hundred sixty-one thousand, five hundred twenty-two".