172530725 has 12 divisors (see below), whose sum is σ = 216059460. Its totient is φ = 136656000.

The previous prime is 172530679. The next prime is 172530727. The reversal of 172530725 is 527035271.

It can be written as a sum of positive squares in 6 ways, for example, as 31348801 + 141181924 = 5599^2 + 11882^2 .

It is not a de Polignac number, because 172530725 - 2¹⁰ = 172529701 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172530691 and 172530700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172530727) 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 11 ways as a sum of consecutive naturals, for example, 31640 + ... + 36689.

It is an arithmetic number, because the mean of its divisors is an integer number (18004955).

Almost surely, 2^172530725 is an apocalyptic number.

It is an amenable number.

172530725 is a deficient number, since it is larger than the sum of its proper divisors (43528735).

172530725 is a wasteful number, since it uses less digits than its factorization.

172530725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68440 (or 68435 counting only the distinct ones).

The product of its (nonzero) digits is 14700, while the sum is 32.

The square root of 172530725 is about 13135.0951652434. The cubic root of 172530725 is about 556.7011892885.

Adding to 172530725 its reverse (527035271), we get a palindrome (699565996).

The spelling of 172530725 in words is "one hundred seventy-two million, five hundred thirty thousand, seven hundred twenty-five".