980721 has 16 divisors (see below), whose sum is σ = 1660800. Its totient is φ = 560304.

The previous prime is 980719. The next prime is 980729. The reversal of 980721 is 127089.

It is not a de Polignac number, because 980721 - 2¹ = 980719 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (980729) 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, 2406 + ... + 2783.

It is an arithmetic number, because the mean of its divisors is an integer number (103800).

2⁹⁸⁰⁷²¹ is an apocalyptic number.

It is an amenable number.

980721 is a deficient number, since it is larger than the sum of its proper divisors (680079).

980721 is a wasteful number, since it uses less digits than its factorization.

980721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5205 (or 5199 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 980721 is about 990.3135866987. The cubic root of 980721 is about 99.3531920818.

The spelling of 980721 in words is "nine hundred eighty thousand, seven hundred twenty-one".