172424 has 16 divisors (see below), whose sum is σ = 369600. Its totient is φ = 73872.

The previous prime is 172423. The next prime is 172427. The reversal of 172424 is 424271.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 172396 and 172405.

It is not an unprimeable number, because it can be changed into a prime (172421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1484 + ... + 1595.

It is an arithmetic number, because the mean of its divisors is an integer number (23100).

2¹⁷²⁴²⁴ is an apocalyptic number.

172424 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

172424 is an abundant number, since it is smaller than the sum of its proper divisors (197176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172424 is a wasteful number, since it uses less digits than its factorization.

172424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3092 (or 3088 counting only the distinct ones).

The product of its digits is 448, while the sum is 20.

The square root of 172424 is about 415.2396898178. The cubic root of 172424 is about 55.6586376522.

Adding to 172424 its reverse (424271), we get a palindrome (596695).

The spelling of 172424 in words is "one hundred seventy-two thousand, four hundred twenty-four", and thus it is an iban number.