1995851 has 16 divisors (see below), whose sum is σ = 2485728. Its totient is φ = 1574400.

The previous prime is 1995841. The next prime is 1995857. The reversal of 1995851 is 1585991.

It is a cyclic number.

It is not a de Polignac number, because 1995851 - 2⁶ = 1995787 is a prime.

It is a Duffinian number.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2021 + ... + 2841.

It is an arithmetic number, because the mean of its divisors is an integer number (155358).

2^1995851 is an apocalyptic number.

1995851 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1995851 is a deficient number, since it is larger than the sum of its proper divisors (489877).

1995851 is a wasteful number, since it uses less digits than its factorization.

1995851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862.

The product of its digits is 16200, while the sum is 38.

The square root of 1995851 is about 1412.7459077980. The cubic root of 1995851 is about 125.9049211334.

The spelling of 1995851 in words is "one million, nine hundred ninety-five thousand, eight hundred fifty-one".