172479 has 4 divisors (see below), whose sum is σ = 229976. Its totient is φ = 114984.

The previous prime is 172441. The next prime is 172489. The reversal of 172479 is 974271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 974271 = 3 ⋅324757.

It is not a de Polignac number, because 172479 - 2⁷ = 172351 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28744 + ... + 28749.

It is an arithmetic number, because the mean of its divisors is an integer number (57494).

2¹⁷²⁴⁷⁹ is an apocalyptic number.

172479 is a deficient number, since it is larger than the sum of its proper divisors (57497).

172479 is an equidigital number, since it uses as much as digits as its factorization.

172479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57496.

The product of its digits is 3528, while the sum is 30.

The square root of 172479 is about 415.3059113473. The cubic root of 172479 is about 55.6645550412.

The spelling of 172479 in words is "one hundred seventy-two thousand, four hundred seventy-nine".