1995517 has 2 divisors, whose sum is σ = 1995518. Its totient is φ = 1995516.

The previous prime is 1995481. The next prime is 1995527. The reversal of 1995517 is 7155991.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1052676 + 942841 = 1026^2 + 971^2 .

It is an emirp because it is prime and its reverse (7155991) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1995517 is a prime.

It is an Ulam number.

1995517 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1995527) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997758 + 997759.

It is an arithmetic number, because the mean of its divisors is an integer number (997759).

2^1995517 is an apocalyptic number.

It is an amenable number.

1995517 is a deficient number, since it is larger than the sum of its proper divisors (1).

1995517 is an equidigital number, since it uses as much as digits as its factorization.

1995517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14175, while the sum is 37.

The square root of 1995517 is about 1412.6276933432. The cubic root of 1995517 is about 125.8978974646.

The spelling of 1995517 in words is "one million, nine hundred ninety-five thousand, five hundred seventeen".