164557 is nontrivially palindromic in base 7.
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: 755461 = 7 ⋅107923.
It is a cyclic number.
It is a Duffinian number.
164557 is a lucky number.
It is a congruent number.
2164557 is an apocalyptic number.
It is an amenable number.
164557 is an equidigital number, since it uses as much as digits as its factorization.
164557 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2162.
The square root of 164557 is about 405.6562584258. The cubic root of 164557 is about 54.7989352804.
The spelling of 164557 in words is "one hundred sixty-four thousand, five hundred fifty-seven".