981597 has 16 divisors (see below), whose sum is σ = 1460160. Its totient is φ = 582912.

The previous prime is 981587. The next prime is 981599. The reversal of 981597 is 795189.

It is a happy number.

It is not a de Polignac number, because 981597 - 2¹¹ = 979549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981599) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 463 + ... + 1475.

It is an arithmetic number, because the mean of its divisors is an integer number (91260).

2⁹⁸¹⁵⁹⁷ is an apocalyptic number.

It is an amenable number.

981597 is a deficient number, since it is larger than the sum of its proper divisors (478563).

981597 is a wasteful number, since it uses less digits than its factorization.

981597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052.

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

The square root of 981597 is about 990.7557721255. The cubic root of 981597 is about 99.3827647111.

The spelling of 981597 in words is "nine hundred eighty-one thousand, five hundred ninety-seven".