981280 has 24 divisors (see below), whose sum is σ = 2318652. Its totient is φ = 392448.

The previous prime is 981271. The next prime is 981283. The reversal of 981280 is 82189.

981280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 929296 + 51984 = 964^2 + 228^2 .

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (981283) by changing a digit.

981280 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2907 + ... + 3226.

2⁹⁸¹²⁸⁰ is an apocalyptic number.

It is an amenable number.

981280 is an abundant number, since it is smaller than the sum of its proper divisors (1337372).

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

981280 is a wasteful number, since it uses less digits than its factorization.

981280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6148 (or 6140 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 981280 is about 990.5957803262. The cubic root of 981280 is about 99.3720652325.

It can be divided in two parts, 98 and 1280, that added together give a triangular number (1378 = T₅₂).

The spelling of 981280 in words is "nine hundred eighty-one thousand, two hundred eighty".