981975 has 12 divisors (see below), whose sum is σ = 1623656. Its totient is φ = 523680.

The previous prime is 981961. The next prime is 981979. The reversal of 981975 is 579189.

It is a happy number.

It is not a de Polignac number, because 981975 - 2¹⁹ = 457687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6472 + ... + 6621.

2⁹⁸¹⁹⁷⁵ is an apocalyptic number.

981975 is a deficient number, since it is larger than the sum of its proper divisors (641681).

981975 is a wasteful number, since it uses less digits than its factorization.

981975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13106 (or 13101 counting only the distinct ones).

The product of its digits is 22680, while the sum is 39.

The square root of 981975 is about 990.9465172248. The cubic root of 981975 is about 99.3955200693.

The spelling of 981975 in words is "nine hundred eighty-one thousand, nine hundred seventy-five".