1995131 has 4 divisors (see below), whose sum is σ = 2009832. Its totient is φ = 1980432.

The previous prime is 1995121. The next prime is 1995139. The reversal of 1995131 is 1315991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1995131 - 2¹⁸ = 1732987 is a prime.

It is a super-2 number, since 2×1995131² = 7961095414322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1995094 and 1995103.

It is not an unprimeable number, because it can be changed into a prime (1995139) 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, 7145 + ... + 7418.

It is an arithmetic number, because the mean of its divisors is an integer number (502458).

2^1995131 is an apocalyptic number.

1995131 is a deficient number, since it is larger than the sum of its proper divisors (14701).

1995131 is a wasteful number, since it uses less digits than its factorization.

1995131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14700.

The product of its digits is 1215, while the sum is 29.

The square root of 1995131 is about 1412.4910619186. The cubic root of 1995131 is about 125.8897793140.

The spelling of 1995131 in words is "one million, nine hundred ninety-five thousand, one hundred thirty-one".