1995491 has 4 divisors (see below), whose sum is σ = 2000232. Its totient is φ = 1990752.

The previous prime is 1995481. The next prime is 1995517. The reversal of 1995491 is 1945991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1995491 - 2¹⁰ = 1994467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1995421) 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 3 ways as a sum of consecutive naturals, for example, 1670 + ... + 2603.

It is an arithmetic number, because the mean of its divisors is an integer number (500058).

2^1995491 is an apocalyptic number.

1995491 is a deficient number, since it is larger than the sum of its proper divisors (4741).

1995491 is an equidigital number, since it uses as much as digits as its factorization.

1995491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4740.

The product of its digits is 14580, while the sum is 38.

The square root of 1995491 is about 1412.6184906053. The cubic root of 1995491 is about 125.8973506790.

The spelling of 1995491 in words is "one million, nine hundred ninety-five thousand, four hundred ninety-one".