981321 has 16 divisors (see below), whose sum is σ = 1444608. Its totient is φ = 587600.

The previous prime is 981319. The next prime is 981373. The reversal of 981321 is 123189.

It is a cyclic number.

It is not a de Polignac number, because 981321 - 2¹ = 981319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 981291 and 981300.

It is not an unprimeable number, because it can be changed into a prime (981301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4210 + ... + 4436.

It is an arithmetic number, because the mean of its divisors is an integer number (90288).

2⁹⁸¹³²¹ is an apocalyptic number.

It is an amenable number.

981321 is a deficient number, since it is larger than the sum of its proper divisors (463287).

981321 is a wasteful number, since it uses less digits than its factorization.

981321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372.

The product of its digits is 432, while the sum is 24.

The square root of 981321 is about 990.6164747267. The cubic root of 981321 is about 99.3734492064.

The spelling of 981321 in words is "nine hundred eighty-one thousand, three hundred twenty-one".