981100 has 18 divisors (see below), whose sum is σ = 2129204. Its totient is φ = 392400.

The previous prime is 981091. The next prime is 981133. The reversal of 981100 is 1189.

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4806 + ... + 5005.

2⁹⁸¹¹⁰⁰ is an apocalyptic number.

It is an amenable number.

981100 is an abundant number, since it is smaller than the sum of its proper divisors (1148104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

981100 is a wasteful number, since it uses less digits than its factorization.

981100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9825 (or 9818 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 981100 is about 990.5049217445. The cubic root of 981100 is about 99.3659887930.

Adding to 981100 its reverse (1189), we get a palindrome (982289).

It can be divided in two parts, 981 and 100, that added together give a triangular number (1081 = T₄₆).

The spelling of 981100 in words is "nine hundred eighty-one thousand, one hundred".