190001 has 4 divisors (see below), whose sum is σ = 217152. Its totient is φ = 162852.

The previous prime is 189997. The next prime is 190027. The reversal of 190001 is 100091.

190001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an emirpimes, since its reverse is a distinct semiprime: 100091 = 101 ⋅991.

It is a cyclic number.

It is not a de Polignac number, because 190001 - 2² = 189997 is a prime.

It is a super-2 number, since 2×190001² = 72200760002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190031) 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, 13565 + ... + 13578.

It is an arithmetic number, because the mean of its divisors is an integer number (54288).

2¹⁹⁰⁰⁰¹ is an apocalyptic number.

It is an amenable number.

190001 is a deficient number, since it is larger than the sum of its proper divisors (27151).

190001 is an equidigital number, since it uses as much as digits as its factorization.

190001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27150.

The product of its (nonzero) digits is 9, while the sum is 11.

The square root of 190001 is about 435.8910414312. The cubic root of 190001 is about 57.4890716471.

Adding to 190001 its reverse (100091), we get a palindrome (290092).

The spelling of 190001 in words is "one hundred ninety thousand, one".