1995885 has 24 divisors (see below), whose sum is σ = 3664440. Its totient is φ = 1001472.

The previous prime is 1995883. The next prime is 1995913. The reversal of 1995885 is 5885991.

It can be written as a sum of positive squares in 4 ways, for example, as 393129 + 1602756 = 627^2 + 1266^2 .

It is not a de Polignac number, because 1995885 - 2¹ = 1995883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1995885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1995883) 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 23 ways as a sum of consecutive naturals, for example, 540 + ... + 2069.

It is an arithmetic number, because the mean of its divisors is an integer number (152685).

2^1995885 is an apocalyptic number.

1995885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1995885 is a deficient number, since it is larger than the sum of its proper divisors (1668555).

1995885 is a wasteful number, since it uses less digits than its factorization.

1995885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2637 (or 2634 counting only the distinct ones).

The product of its digits is 129600, while the sum is 45.

The square root of 1995885 is about 1412.7579410501. The cubic root of 1995885 is about 125.9056360737.

It can be divided in two parts, 199 and 5885, that added together give a square (6084 = 78²).

The spelling of 1995885 in words is "one million, nine hundred ninety-five thousand, eight hundred eighty-five".