861801 has 8 divisors (see below), whose sum is σ = 1160640. Its totient is φ = 568752.

The previous prime is 861799. The next prime is 861803. The reversal of 861801 is 108168.

861801 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (861799) and next prime (861803).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 861801 - 2¹ = 861799 is a prime.

It is a plaindrome in base 12.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 861801.

It is not an unprimeable number, because it can be changed into a prime (861803) 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, 1086 + ... + 1703.

It is an arithmetic number, because the mean of its divisors is an integer number (145080).

2⁸⁶¹⁸⁰¹ is an apocalyptic number.

It is an amenable number.

861801 is a deficient number, since it is larger than the sum of its proper divisors (298839).

861801 is a wasteful number, since it uses less digits than its factorization.

861801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2895.

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 861801 is about 928.3323758224. The cubic root of 861801 is about 95.1631913463.

Adding to 861801 its reverse (108168), we get a palindrome (969969).

The spelling of 861801 in words is "eight hundred sixty-one thousand, eight hundred one".