981895 has 4 divisors (see below), whose sum is σ = 1178280. Its totient is φ = 785512.

The previous prime is 981889. The next prime is 981913. The reversal of 981895 is 598189.

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 981895 - 2³ = 981887 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98185 + ... + 98194.

It is an arithmetic number, because the mean of its divisors is an integer number (294570).

2⁹⁸¹⁸⁹⁵ is an apocalyptic number.

981895 is a deficient number, since it is larger than the sum of its proper divisors (196385).

981895 is a wasteful number, since it uses less digits than its factorization.

981895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196384.

The product of its digits is 25920, while the sum is 40.

The square root of 981895 is about 990.9061509548. The cubic root of 981895 is about 99.3928207957.

The spelling of 981895 in words is "nine hundred eighty-one thousand, eight hundred ninety-five".