1995556 has 12 divisors (see below), whose sum is σ = 3558492. Its totient is φ = 978848.

The previous prime is 1995547. The next prime is 1995583. The reversal of 1995556 is 6555991.

It can be written as a sum of positive squares in 2 ways, for example, as 1822500 + 173056 = 1350^2 + 416^2 .

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4495 + ... + 4918.

It is an arithmetic number, because the mean of its divisors is an integer number (296541).

2^1995556 is an apocalyptic number.

It is an amenable number.

1995556 is a deficient number, since it is larger than the sum of its proper divisors (1562936).

1995556 is a wasteful number, since it uses less digits than its factorization.

1995556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9470 (or 9468 counting only the distinct ones).

The product of its digits is 60750, while the sum is 40.

The square root of 1995556 is about 1412.6414973375. The cubic root of 1995556 is about 125.8987176340.

The spelling of 1995556 in words is "one million, nine hundred ninety-five thousand, five hundred fifty-six".