981845 has 8 divisors (see below), whose sum is σ = 1188000. Its totient is φ = 778960.

The previous prime is 981823. The next prime is 981887. The reversal of 981845 is 548189.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-981845 is a prime.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 981845.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95 + ... + 1404.

It is an arithmetic number, because the mean of its divisors is an integer number (148500).

2⁹⁸¹⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

981845 is a deficient number, since it is larger than the sum of its proper divisors (206155).

981845 is a wasteful number, since it uses less digits than its factorization.

981845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635.

The product of its digits is 11520, while the sum is 35.

The square root of 981845 is about 990.8809212009. The cubic root of 981845 is about 99.3911336752.

It can be divided in two parts, 98184 and 5, that added together give a palindrome (98189).

The spelling of 981845 in words is "nine hundred eighty-one thousand, eight hundred forty-five".