981281 has 8 divisors (see below), whose sum is σ = 1133184. Its totient is φ = 832320.

The previous prime is 981271. The next prime is 981283. The reversal of 981281 is 182189.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 981281 - 2¹⁴ = 964897 is a prime.

It is a super-2 number, since 2×981281² = 1925824801922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 981281.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41 + ... + 1401.

It is an arithmetic number, because the mean of its divisors is an integer number (141648).

2⁹⁸¹²⁸¹ is an apocalyptic number.

It is an amenable number.

981281 is a deficient number, since it is larger than the sum of its proper divisors (151903).

981281 is a wasteful number, since it uses less digits than its factorization.

981281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471.

The product of its digits is 1152, while the sum is 29.

The square root of 981281 is about 990.5962850728. The cubic root of 981281 is about 99.3720989884.

The spelling of 981281 in words is "nine hundred eighty-one thousand, two hundred eighty-one".