172148128 has 12 divisors (see below), whose sum is σ = 338916690. Its totient is φ = 86074048.

The previous prime is 172148117. The next prime is 172148153. The reversal of 172148128 is 821841271.

It can be written as a sum of positive squares in only one way, i.e., 115175824 + 56972304 = 10732^2 + 7548^2 .

It is a junction number, because it is equal to n+sod(n) for n = 172148093 and 172148102.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2689783 + ... + 2689846.

Almost surely, 2^172148128 is an apocalyptic number.

It is an amenable number.

172148128 is a deficient number, since it is larger than the sum of its proper divisors (166768562).

172148128 is an equidigital number, since it uses as much as digits as its factorization.

172148128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5379639 (or 5379631 counting only the distinct ones).

The product of its digits is 7168, while the sum is 34.

The square root of 172148128 is about 13120.5231603012. The cubic root of 172148128 is about 556.2893788896.

Adding to 172148128 its reverse (821841271), we get a palindrome (993989399).

The spelling of 172148128 in words is "one hundred seventy-two million, one hundred forty-eight thousand, one hundred twenty-eight".