160021 has 4 divisors (see below), whose sum is σ = 169452. Its totient is φ = 150592.

The previous prime is 160019. The next prime is 160031. The reversal of 160021 is 120061.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 148996 + 11025 = 386^2 + 105^2 .

It is a cyclic number.

It is not a de Polignac number, because 160021 - 2¹ = 160019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (160001) 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, 4690 + ... + 4723.

It is an arithmetic number, because the mean of its divisors is an integer number (42363).

2¹⁶⁰⁰²¹ is an apocalyptic number.

It is an amenable number.

160021 is a deficient number, since it is larger than the sum of its proper divisors (9431).

160021 is an equidigital number, since it uses as much as digits as its factorization.

160021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9430.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 160021 is about 400.0262491387. The cubic root of 160021 is about 54.2907273434.

Adding to 160021 its reverse (120061), we get a palindrome (280082).

The spelling of 160021 in words is "one hundred sixty thousand, twenty-one".