167021 has 2 divisors, whose sum is σ = 167022. Its totient is φ = 167020.

The previous prime is 167017. The next prime is 167023. The reversal of 167021 is 120761.

It is a happy number.

167021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122500 + 44521 = 350^2 + 211^2 .

It is a cyclic number.

It is not a de Polignac number, because 167021 - 2² = 167017 is a prime.

It is a Sophie Germain prime.

Together with 167023, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a zygodrome in base 3.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 167021.

It is not a weakly prime, because it can be changed into another prime (167023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83510 + 83511.

It is an arithmetic number, because the mean of its divisors is an integer number (83511).

2¹⁶⁷⁰²¹ is an apocalyptic number.

It is an amenable number.

167021 is a deficient number, since it is larger than the sum of its proper divisors (1).

167021 is an equidigital number, since it uses as much as digits as its factorization.

167021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 167021 is about 408.6820279875. The cubic root of 167021 is about 55.0710926395.

Adding to 167021 its reverse (120761), we get a palindrome (287782).

The spelling of 167021 in words is "one hundred sixty-seven thousand, twenty-one".