861443 has 8 divisors (see below), whose sum is σ = 953856. Its totient is φ = 771400.

The previous prime is 861439. The next prime is 861491. The reversal of 861443 is 344168.

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 861443 - 2² = 861439 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 7 ways as a sum of consecutive naturals, for example, 230 + ... + 1332.

It is an arithmetic number, because the mean of its divisors is an integer number (119232).

2⁸⁶¹⁴⁴³ is an apocalyptic number.

861443 is a deficient number, since it is larger than the sum of its proper divisors (92413).

861443 is a wasteful number, since it uses less digits than its factorization.

861443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185.

The product of its digits is 2304, while the sum is 26.

The square root of 861443 is about 928.1395369232. The cubic root of 861443 is about 95.1500123018.

The spelling of 861443 in words is "eight hundred sixty-one thousand, four hundred forty-three".