32161 has 4 divisors (see below), whose sum is σ = 33300. Its totient is φ = 31024.

The previous prime is 32159. The next prime is 32173. The reversal of 32161 is 16123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16123 = 23 ⋅701.

It can be written as a sum of positive squares in 2 ways, for example, as 6561 + 25600 = 81^2 + 160^2 .

It is a cyclic number.

It is not a de Polignac number, because 32161 - 2¹ = 32159 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (32141) 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, 526 + ... + 583.

It is an arithmetic number, because the mean of its divisors is an integer number (8325).

2³²¹⁶¹ is an apocalyptic number.

It is an amenable number.

32161 is a deficient number, since it is larger than the sum of its proper divisors (1139).

32161 is a wasteful number, since it uses less digits than its factorization.

32161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138.

The product of its digits is 36, while the sum is 13.

The square root of 32161 is about 179.3348822734. The cubic root of 32161 is about 31.8011760703.

Adding to 32161 its reverse (16123), we get a palindrome (48284).

The spelling of 32161 in words is "thirty-two thousand, one hundred sixty-one".