981158 has 4 divisors (see below), whose sum is σ = 1471740. Its totient is φ = 490578.

The previous prime is 981151. The next prime is 981173. The reversal of 981158 is 851189.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 851189 = 359 ⋅2371.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 245288 + ... + 245291.

It is an arithmetic number, because the mean of its divisors is an integer number (367935).

2⁹⁸¹¹⁵⁸ is an apocalyptic number.

981158 is a deficient number, since it is larger than the sum of its proper divisors (490582).

981158 is a wasteful number, since it uses less digits than its factorization.

981158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490581.

The product of its digits is 2880, while the sum is 32.

The square root of 981158 is about 990.5341993086. The cubic root of 981158 is about 99.3679468380.

The spelling of 981158 in words is "nine hundred eighty-one thousand, one hundred fifty-eight".