101995 has 4 divisors (see below), whose sum is σ = 122400. Its totient is φ = 81592.

The previous prime is 101987. The next prime is 101999. The reversal of 101995 is 599101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 599101 = 137 ⋅4373.

It is a cyclic number.

It is not a de Polignac number, because 101995 - 2³ = 101987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101999) 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, 10195 + ... + 10204.

It is an arithmetic number, because the mean of its divisors is an integer number (30600).

2¹⁰¹⁹⁹⁵ is an apocalyptic number.

101995 is a deficient number, since it is larger than the sum of its proper divisors (20405).

101995 is an equidigital number, since it uses as much as digits as its factorization.

101995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20404.

The product of its (nonzero) digits is 405, while the sum is 25.

The square root of 101995 is about 319.3665605539. The cubic root of 101995 is about 46.7225238187.

Adding to 101995 its product of nonzero digits (405), we get a square (102400 = 320²).

The spelling of 101995 in words is "one hundred one thousand, nine hundred ninety-five".