1965855 has 16 divisors (see below), whose sum is σ = 3185280. Its totient is φ = 1035168.

The previous prime is 1965853. The next prime is 1965883. The reversal of 1965855 is 5585691.

It is not a de Polignac number, because 1965855 - 2¹ = 1965853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1965851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 456 + ... + 2034.

It is an arithmetic number, because the mean of its divisors is an integer number (199080).

2^1965855 is an apocalyptic number.

1965855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1965855 is a deficient number, since it is larger than the sum of its proper divisors (1219425).

1965855 is a wasteful number, since it uses less digits than its factorization.

1965855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1670.

The product of its digits is 54000, while the sum is 39.

The square root of 1965855 is about 1402.0895121211. The cubic root of 1965855 is about 125.2709854439.

The spelling of 1965855 in words is "one million, nine hundred sixty-five thousand, eight hundred fifty-five".