1995139 has 2 divisors, whose sum is σ = 1995140. Its totient is φ = 1995138.

The previous prime is 1995121. The next prime is 1995143. The reversal of 1995139 is 9315991.

It is a strong prime.

It is an emirp because it is prime and its reverse (9315991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1995139 - 2⁵ = 1995107 is a prime.

It is a Chen prime.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 1995098 and 1995107.

It is not a weakly prime, because it can be changed into another prime (1995109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997569 + 997570.

It is an arithmetic number, because the mean of its divisors is an integer number (997570).

2^1995139 is an apocalyptic number.

1995139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1995139 is an equidigital number, since it uses as much as digits as its factorization.

1995139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10935, while the sum is 37.

The square root of 1995139 is about 1412.4938937921. The cubic root of 1995139 is about 125.8899475765.

The spelling of 1995139 in words is "one million, nine hundred ninety-five thousand, one hundred thirty-nine".