1995111 has 10 divisors (see below), whose sum is σ = 2980472. Its totient is φ = 1330020.

The previous prime is 1995109. The next prime is 1995121. The reversal of 1995111 is 1115991.

It is not a de Polignac number, because 1995111 - 2¹ = 1995109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1995121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 12235 + ... + 12396.

2^1995111 is an apocalyptic number.

1995111 is a deficient number, since it is larger than the sum of its proper divisors (985361).

1995111 is an equidigital number, since it uses as much as digits as its factorization.

1995111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24643 (or 24634 counting only the distinct ones).

The product of its digits is 405, while the sum is 27.

The square root of 1995111 is about 1412.4839822101. The cubic root of 1995111 is about 125.8893586559.

It can be divided in two parts, 1995 and 111, that multiplied together give a triangular number (221445 = T₆₆₅).

The spelling of 1995111 in words is "one million, nine hundred ninety-five thousand, one hundred eleven".