981161 has 4 divisors (see below), whose sum is σ = 984912. Its totient is φ = 977412.

The previous prime is 981151. The next prime is 981173. The reversal of 981161 is 161189.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 161189 = 7 ⋅23027.

It is a cyclic number.

It is not a de Polignac number, because 981161 - 2¹⁰ = 980137 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 981161.

It is not an unprimeable number, because it can be changed into a prime (981151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1451 + ... + 2016.

It is an arithmetic number, because the mean of its divisors is an integer number (246228).

2⁹⁸¹¹⁶¹ is an apocalyptic number.

It is an amenable number.

981161 is a deficient number, since it is larger than the sum of its proper divisors (3751).

981161 is a wasteful number, since it uses less digits than its factorization.

981161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3750.

The product of its digits is 432, while the sum is 26.

The square root of 981161 is about 990.5357136419. The cubic root of 981161 is about 99.3680481141.

The spelling of 981161 in words is "nine hundred eighty-one thousand, one hundred sixty-one".