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168001 = 433907
BaseRepresentation
bin101001000001000001
322112110021
4221001001
520334001
63333441
71266541
oct510101
9275407
10168001
11105249
1281281
135b612
1445321
1534ba1
hex29041

168001 has 4 divisors (see below), whose sum is σ = 171952. Its totient is φ = 164052.

The previous prime is 167987. The next prime is 168013. The reversal of 168001 is 100861.

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.

It is a cyclic number.

It is not a de Polignac number, because 168001 - 27 = 167873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1911 + ... + 1996.

It is an arithmetic number, because the mean of its divisors is an integer number (42988).

2168001 is an apocalyptic number.

It is an amenable number.

168001 is a deficient number, since it is larger than the sum of its proper divisors (3951).

168001 is an equidigital number, since it uses as much as digits as its factorization.

168001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3950.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 168001 is about 409.8792505117. The cubic root of 168001 is about 55.1785930085.

Adding to 168001 its reverse (100861), we get a palindrome (268862).

The spelling of 168001 in words is "one hundred sixty-eight thousand, one".

Divisors: 1 43 3907 168001