103861 has 4 divisors (see below), whose sum is σ = 104512. Its totient is φ = 103212.

The previous prime is 103843. The next prime is 103867. The reversal of 103861 is 168301.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 168301 = 7 ⋅24043.

It is a cyclic number.

It is not a de Polignac number, because 103861 - 2⁹ = 103349 is a prime.

It is a Duffinian number.

103861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103867) 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, 100 + ... + 466.

It is an arithmetic number, because the mean of its divisors is an integer number (26128).

2¹⁰³⁸⁶¹ is an apocalyptic number.

It is an amenable number.

103861 is a deficient number, since it is larger than the sum of its proper divisors (651).

103861 is an equidigital number, since it uses as much as digits as its factorization.

103861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 103861 is about 322.2747275230. The cubic root of 103861 is about 47.0057334186.

The spelling of 103861 in words is "one hundred three thousand, eight hundred sixty-one".