172730625 has 40 divisors (see below), whose sum is σ = 304777440. Its totient is φ = 86688000.

The previous prime is 172730617. The next prime is 172730681. The reversal of 172730625 is 526037271.

It is not a de Polignac number, because 172730625 - 2³ = 172730617 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 29166 + ... + 34584.

It is an arithmetic number, because the mean of its divisors is an integer number (7619436).

Almost surely, 2^172730625 is an apocalyptic number.

172730625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172730625 is a deficient number, since it is larger than the sum of its proper divisors (132046815).

172730625 is an equidigital number, since it uses as much as digits as its factorization.

172730625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5459 (or 5444 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 33.

The square root of 172730625 is about 13142.7023476909. The cubic root of 172730625 is about 556.9161106520.

Adding to 172730625 its reverse (526037271), we get a palindrome (698767896).

The spelling of 172730625 in words is "one hundred seventy-two million, seven hundred thirty thousand, six hundred twenty-five".