162921 has 8 divisors (see below), whose sum is σ = 237024. Its totient is φ = 98720.

The previous prime is 162917. The next prime is 162937. The reversal of 162921 is 129261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 162921 - 2² = 162917 is a prime.

162921 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (162901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2436 + ... + 2501.

It is an arithmetic number, because the mean of its divisors is an integer number (29628).

2¹⁶²⁹²¹ is an apocalyptic number.

162921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

162921 is a deficient number, since it is larger than the sum of its proper divisors (74103).

162921 is a wasteful number, since it uses less digits than its factorization.

162921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4951.

The product of its digits is 216, while the sum is 21.

The square root of 162921 is about 403.6347358690. The cubic root of 162921 is about 54.6167292992.

The spelling of 162921 in words is "one hundred sixty-two thousand, nine hundred twenty-one".