12172653 has 8 divisors (see below), whose sum is σ = 18033600. Its totient is φ = 8115084.

The previous prime is 12172649. The next prime is 12172661. The reversal of 12172653 is 35627121.

It is a happy number.

12172653 is a `hidden beast` number, since 1 + 2 + 1 + 7 + 2 + 653 = 666.

It is not a de Polignac number, because 12172653 - 2² = 12172649 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 450839 = 12172653 / (1 + 2 + 1 + 7 + 2 + 6 + 5 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12172253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225393 + ... + 225446.

It is an arithmetic number, because the mean of its divisors is an integer number (2254200).

Almost surely, 2^12172653 is an apocalyptic number.

It is an amenable number.

12172653 is a deficient number, since it is larger than the sum of its proper divisors (5860947).

12172653 is an equidigital number, since it uses as much as digits as its factorization.

12172653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450848 (or 450842 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 12172653 is about 3488.9329314276. The cubic root of 12172653 is about 230.0356151527.

Adding to 12172653 its reverse (35627121), we get a palindrome (47799774).

The spelling of 12172653 in words is "twelve million, one hundred seventy-two thousand, six hundred fifty-three".