1995957 has 6 divisors (see below), whose sum is σ = 2883062. Its totient is φ = 1330632.

The previous prime is 1995947. The next prime is 1995967. The reversal of 1995957 is 7595991.

It is an interprime number because it is at equal distance from previous prime (1995947) and next prime (1995967).

It can be written as a sum of positive squares in only one way, i.e., 1726596 + 269361 = 1314^2 + 519^2 .

It is not a de Polignac number, because 1995957 - 2¹² = 1991861 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 (1995937) 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 5 ways as a sum of consecutive naturals, for example, 110878 + ... + 110895.

2^1995957 is an apocalyptic number.

It is an amenable number.

1995957 is a deficient number, since it is larger than the sum of its proper divisors (887105).

1995957 is a wasteful number, since it uses less digits than its factorization.

1995957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221779 (or 221776 counting only the distinct ones).

The product of its digits is 127575, while the sum is 45.

The square root of 1995957 is about 1412.7834228926. The cubic root of 1995957 is about 125.9071500382.

The spelling of 1995957 in words is "one million, nine hundred ninety-five thousand, nine hundred fifty-seven".