1995971 has 2 divisors, whose sum is σ = 1995972. Its totient is φ = 1995970.

The previous prime is 1995967. The next prime is 1995977. The reversal of 1995971 is 1795991.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1795991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1995971 - 2² = 1995967 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1995977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997985 + 997986.

It is an arithmetic number, because the mean of its divisors is an integer number (997986).

2^1995971 is an apocalyptic number.

1995971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1995971 is an equidigital number, since it uses as much as digits as its factorization.

1995971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25515, while the sum is 41.

The square root of 1995971 is about 1412.7883776419. The cubic root of 1995971 is about 125.9074444159.

The spelling of 1995971 in words is "one million, nine hundred ninety-five thousand, nine hundred seventy-one".