161103 has 8 divisors (see below), whose sum is σ = 217728. Its totient is φ = 105944.

The previous prime is 161093. The next prime is 161123. The reversal of 161103 is 301161.

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 161103 - 2⁴ = 161087 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 161103.

It is not an unprimeable number, because it can be changed into a prime (161123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75 + ... + 572.

It is an arithmetic number, because the mean of its divisors is an integer number (27216).

2¹⁶¹¹⁰³ is an apocalyptic number.

161103 is a deficient number, since it is larger than the sum of its proper divisors (56625).

161103 is an equidigital number, since it uses as much as digits as its factorization.

161103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 161103 is about 401.3763819659. The cubic root of 161103 is about 54.4128168690.

Adding to 161103 its reverse (301161), we get a palindrome (462264).

The spelling of 161103 in words is "one hundred sixty-one thousand, one hundred three".