982561 has 4 divisors (see below), whose sum is σ = 987012. Its totient is φ = 978112.

The previous prime is 982559. The next prime is 982571. The reversal of 982561 is 165289.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 165289 = 67 ⋅2467.

It can be written as a sum of positive squares in 2 ways, for example, as 553536 + 429025 = 744^2 + 655^2 .

It is a cyclic number.

It is not a de Polignac number, because 982561 - 2¹ = 982559 is a prime.

It is a super-2 number, since 2×982561² = 1930852237442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (982571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1876 + ... + 2341.

It is an arithmetic number, because the mean of its divisors is an integer number (246753).

2⁹⁸²⁵⁶¹ is an apocalyptic number.

It is an amenable number.

982561 is a deficient number, since it is larger than the sum of its proper divisors (4451).

982561 is a wasteful number, since it uses less digits than its factorization.

982561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4450.

The product of its digits is 4320, while the sum is 31.

The square root of 982561 is about 991.2421500320. The cubic root of 982561 is about 99.4152877797.

The spelling of 982561 in words is "nine hundred eighty-two thousand, five hundred sixty-one".