1995123 has 8 divisors (see below), whose sum is σ = 2864848. Its totient is φ = 1227744.

The previous prime is 1995121. The next prime is 1995139. The reversal of 1995123 is 3215991.

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

It is not a de Polignac number, because 1995123 - 2¹ = 1995121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1995121) 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 7 ways as a sum of consecutive naturals, for example, 25540 + ... + 25617.

It is an arithmetic number, because the mean of its divisors is an integer number (358106).

2^1995123 is an apocalyptic number.

1995123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1995123 is a deficient number, since it is larger than the sum of its proper divisors (869725).

1995123 is a wasteful number, since it uses less digits than its factorization.

1995123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51173.

The product of its digits is 2430, while the sum is 30.

The square root of 1995123 is about 1412.4882300395. The cubic root of 1995123 is about 125.8896110511.

The spelling of 1995123 in words is "one million, nine hundred ninety-five thousand, one hundred twenty-three".