12173121 has 9 divisors (see below), whose sum is σ = 17598529. Its totient is φ = 8108436.

The previous prime is 12173113. The next prime is 12173143. The reversal of 12173121 is 12137121.

It is a happy number.

The square root of 12173121 is 3489.

It is a perfect power (a square), and thus also a powerful number.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 12173121 - 2³ = 12173113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12173094 and 12173103.

It is not an unprimeable number, because it can be changed into a prime (12173321) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9886 + ... + 11048.

Almost surely, 2^12173121 is an apocalyptic number.

12173121 is the 3489-th square number.

12173121 is the 1745-th centered octagonal number.

It is an amenable number.

12173121 is a deficient number, since it is larger than the sum of its proper divisors (5425408).

12173121 is an frugal number, since it uses more digits than its factorization.

12173121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2332 (or 1166 counting only the distinct ones).

The product of its digits is 84, while the sum is 18.

The cubic root of 12173121 is about 230.0385631621.

The spelling of 12173121 in words is "twelve million, one hundred seventy-three thousand, one hundred twenty-one".