169001 has 6 divisors (see below), whose sum is σ = 196650. Its totient is φ = 144816.

The previous prime is 168991. The next prime is 169003. The reversal of 169001 is 100961.

169001 = 33² + 34² + ... + 81².

It can be written as a sum of positive squares in only one way, i.e., 90601 + 78400 = 301^2 + 280^2 .

It is not a de Polignac number, because 169001 - 2⁶ = 168937 is a prime.

It is a super-2 number, since 2×169001² = 57122676002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (169003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1676 + ... + 1773.

It is an arithmetic number, because the mean of its divisors is an integer number (32775).

2¹⁶⁹⁰⁰¹ is an apocalyptic number.

It is an amenable number.

169001 is a deficient number, since it is larger than the sum of its proper divisors (27649).

169001 is an equidigital number, since it uses as much as digits as its factorization.

169001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3463 (or 3456 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 169001 is about 411.0973120807. The cubic root of 169001 is about 55.2878571854.

Adding to 169001 its reverse (100961), we get a palindrome (269962).

The spelling of 169001 in words is "one hundred sixty-nine thousand, one".