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162001 = 723143
BaseRepresentation
bin100111100011010001
322020020001
4213203101
520141001
63250001
71243210
oct474321
9266201
10162001
11100794
1279901
1358978
1443077
1533001
hex278d1

162001 has 4 divisors (see below), whose sum is σ = 185152. Its totient is φ = 138852.

The previous prime is 161999. The next prime is 162007. The reversal of 162001 is 100261.

162001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 100261 = 714323.

It is not a de Polignac number, because 162001 - 21 = 161999 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 (162007) 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, 11565 + ... + 11578.

It is an arithmetic number, because the mean of its divisors is an integer number (46288).

2162001 is an apocalyptic number.

It is an amenable number.

162001 is a deficient number, since it is larger than the sum of its proper divisors (23151).

162001 is an equidigital number, since it uses as much as digits as its factorization.

162001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23150.

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

The square root of 162001 is about 402.4934782080. The cubic root of 162001 is about 54.5137299527.

Adding to 162001 its reverse (100261), we get a palindrome (262262).

The spelling of 162001 in words is "one hundred sixty-two thousand, one".

Divisors: 1 7 23143 162001