160821 has 12 divisors (see below), whose sum is σ = 235872. Its totient is φ = 105576.

The previous prime is 160817. The next prime is 160829. The reversal of 160821 is 128061.

160821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 160821 - 2² = 160817 is a prime.

It is an Ulam number.

It is a nialpdrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 160794 and 160803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (160829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 880 + ... + 1046.

It is an arithmetic number, because the mean of its divisors is an integer number (19656).

2¹⁶⁰⁸²¹ is an apocalyptic number.

It is an amenable number.

160821 is a deficient number, since it is larger than the sum of its proper divisors (75051).

160821 is a wasteful number, since it uses less digits than its factorization.

160821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280 (or 277 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 160821 is about 401.0249368805. The cubic root of 160821 is about 54.3810496638.

Adding to 160821 its reverse (128061), we get a palindrome (288882).

The spelling of 160821 in words is "one hundred sixty thousand, eight hundred twenty-one".