1995855 has 32 divisors (see below), whose sum is σ = 3456000. Its totient is φ = 980352.

The previous prime is 1995841. The next prime is 1995857. The reversal of 1995855 is 5585991.

It is a happy number.

It is not a de Polignac number, because 1995855 - 2⁷ = 1995727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1995857) 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 31 ways as a sum of consecutive naturals, for example, 13321 + ... + 13469.

It is an arithmetic number, because the mean of its divisors is an integer number (108000).

2^1995855 is an apocalyptic number.

1995855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1995855 is a deficient number, since it is larger than the sum of its proper divisors (1460145).

1995855 is a wasteful number, since it uses less digits than its factorization.

1995855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223.

The product of its digits is 81000, while the sum is 42.

The square root of 1995855 is about 1412.7473234800. The cubic root of 1995855 is about 125.9050052445.

It can be divided in two parts, 1995 and 855, that added together give a triangular number (2850 = T₇₅).

The spelling of 1995855 in words is "one million, nine hundred ninety-five thousand, eight hundred fifty-five".