12171125 has 8 divisors (see below), whose sum is σ = 15189720. Its totient is φ = 9736800.

The previous prime is 12171119. The next prime is 12171149. The reversal of 12171125 is 52117121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 323761 + 11847364 = 569^2 + 3442^2 .

It is not a de Polignac number, because 12171125 - 2⁸ = 12170869 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12171097 and 12171106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48560 + ... + 48809.

It is an arithmetic number, because the mean of its divisors is an integer number (1898715).

Almost surely, 2^12171125 is an apocalyptic number.

It is an amenable number.

12171125 is a deficient number, since it is larger than the sum of its proper divisors (3018595).

12171125 is an frugal number, since it uses more digits than its factorization.

12171125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97384 (or 97374 counting only the distinct ones).

The product of its digits is 140, while the sum is 20.

The square root of 12171125 is about 3488.7139464278. The cubic root of 12171125 is about 230.0259895017.

Adding to 12171125 its reverse (52117121), we get a palindrome (64288246).

The spelling of 12171125 in words is "twelve million, one hundred seventy-one thousand, one hundred twenty-five".