981775 has 12 divisors (see below), whose sum is σ = 1229832. Its totient is φ = 777440.

The previous prime is 981769. The next prime is 981797. The reversal of 981775 is 577189.

It is not a de Polignac number, because 981775 - 2⁹ = 981263 is a prime.

It is a Duffinian number.

981775 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4212 + ... + 4438.

It is an arithmetic number, because the mean of its divisors is an integer number (102486).

2⁹⁸¹⁷⁷⁵ is an apocalyptic number.

981775 is a deficient number, since it is larger than the sum of its proper divisors (248057).

981775 is a wasteful number, since it uses less digits than its factorization.

981775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410 (or 405 counting only the distinct ones).

The product of its digits is 17640, while the sum is 37.

The square root of 981775 is about 990.8455984663. The cubic root of 981775 is about 99.3887716104.

The spelling of 981775 in words is "nine hundred eighty-one thousand, seven hundred seventy-five".