172481 has 4 divisors (see below), whose sum is σ = 173652. Its totient is φ = 171312.

The previous prime is 172441. The next prime is 172489. The reversal of 172481 is 184271.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 152881 + 19600 = 391^2 + 140^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172481 is a prime.

It is a super-2 number, since 2×172481² = 59499390722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 172481.

It is not an unprimeable number, because it can be changed into a prime (172489) 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 3 ways as a sum of consecutive naturals, for example, 326 + ... + 671.

It is an arithmetic number, because the mean of its divisors is an integer number (43413).

2¹⁷²⁴⁸¹ is an apocalyptic number.

It is an amenable number.

172481 is a deficient number, since it is larger than the sum of its proper divisors (1171).

172481 is an equidigital number, since it uses as much as digits as its factorization.

172481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170.

The product of its digits is 448, while the sum is 23.

The square root of 172481 is about 415.3083192039. The cubic root of 172481 is about 55.6647701953.

The spelling of 172481 in words is "one hundred seventy-two thousand, four hundred eighty-one".