1995671 has 4 divisors (see below), whose sum is σ = 2007000. Its totient is φ = 1984344.

The previous prime is 1995661. The next prime is 1995677. The reversal of 1995671 is 1765991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1765991 = 83 ⋅21277.

It is a cyclic number.

It is not a de Polignac number, because 1995671 - 2⁶ = 1995607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1995677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5396 + ... + 5753.

It is an arithmetic number, because the mean of its divisors is an integer number (501750).

2^1995671 is an apocalyptic number.

1995671 is a deficient number, since it is larger than the sum of its proper divisors (11329).

1995671 is a wasteful number, since it uses less digits than its factorization.

1995671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11328.

The product of its digits is 17010, while the sum is 38.

The square root of 1995671 is about 1412.6822006382. The cubic root of 1995671 is about 125.9011360200.

The spelling of 1995671 in words is "one million, nine hundred ninety-five thousand, six hundred seventy-one".