1995381 has 16 divisors (see below), whose sum is σ = 2977920. Its totient is φ = 1320480.

The previous prime is 1995359. The next prime is 1995391. The reversal of 1995381 is 1835991.

It is a happy number.

It is not a de Polignac number, because 1995381 - 2⁵ = 1995349 is a prime.

It is a super-2 number, since 2×1995381² = 7963090670322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1995311) 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 15 ways as a sum of consecutive naturals, for example, 6961 + ... + 7241.

It is an arithmetic number, because the mean of its divisors is an integer number (186120).

2^1995381 is an apocalyptic number.

It is an amenable number.

1995381 is a deficient number, since it is larger than the sum of its proper divisors (982539).

1995381 is a wasteful number, since it uses less digits than its factorization.

1995381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553 (or 547 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 1995381 is about 1412.5795552818. The cubic root of 1995381 is about 125.8950373030.

The spelling of 1995381 in words is "one million, nine hundred ninety-five thousand, three hundred eighty-one".