172425 has 36 divisors (see below), whose sum is σ = 329840. Its totient is φ = 79200.

The previous prime is 172423. The next prime is 172427. The reversal of 172425 is 524271.

It is an interprime number because it is at equal distance from previous prime (172423) and next prime (172427).

It is not a de Polignac number, because 172425 - 2¹ = 172423 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (172421) 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 35 ways as a sum of consecutive naturals, for example, 9066 + ... + 9084.

2¹⁷²⁴²⁵ is an apocalyptic number.

172425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172425 is a deficient number, since it is larger than the sum of its proper divisors (157415).

172425 is a wasteful number, since it uses less digits than its factorization.

172425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54 (or 38 counting only the distinct ones).

The product of its digits is 560, while the sum is 21.

The square root of 172425 is about 415.2408939399. The cubic root of 172425 is about 55.6587452523.

Adding to 172425 its reverse (524271), we get a palindrome (696696).

It can be divided in two parts, 17 and 2425, that added together give a palindrome (2442).

The spelling of 172425 in words is "one hundred seventy-two thousand, four hundred twenty-five".