861473 has 4 divisors (see below), whose sum is σ = 873348. Its totient is φ = 849600.

The previous prime is 861439. The next prime is 861491. The reversal of 861473 is 374168.

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

It can be written as a sum of positive squares in 2 ways, for example, as 473344 + 388129 = 688^2 + 623^2 .

It is a cyclic number.

It is not a de Polignac number, because 861473 - 2¹⁶ = 795937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (861433) 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, 5828 + ... + 5973.

It is an arithmetic number, because the mean of its divisors is an integer number (218337).

2⁸⁶¹⁴⁷³ is an apocalyptic number.

It is an amenable number.

861473 is a deficient number, since it is larger than the sum of its proper divisors (11875).

861473 is a wasteful number, since it uses less digits than its factorization.

861473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11874.

The product of its digits is 4032, while the sum is 29.

The square root of 861473 is about 928.1556981455. The cubic root of 861473 is about 95.1511168312.

It can be divided in two parts, 861 and 473, that multiplied together give a triangular number (407253 = T₉₀₂).

The spelling of 861473 in words is "eight hundred sixty-one thousand, four hundred seventy-three".