1995506 has 8 divisors (see below), whose sum is σ = 3007020. Its totient is φ = 993168.

The previous prime is 1995481. The next prime is 1995517. The reversal of 1995506 is 6055991.

It can be written as a sum of positive squares in 2 ways, for example, as 1288225 + 707281 = 1135^2 + 841^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1721 + ... + 2636.

2^1995506 is an apocalyptic number.

1995506 is a deficient number, since it is larger than the sum of its proper divisors (1011514).

1995506 is a wasteful number, since it uses less digits than its factorization.

1995506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4588.

The product of its (nonzero) digits is 12150, while the sum is 35.

The square root of 1995506 is about 1412.6237998845. The cubic root of 1995506 is about 125.8976661328.

The spelling of 1995506 in words is "one million, nine hundred ninety-five thousand, five hundred six".