12172727 has 16 divisors (see below), whose sum is σ = 14822400. Its totient is φ = 9973656.

The previous prime is 12172723. The next prime is 12172729. The reversal of 12172727 is 72727121.

It is not a de Polignac number, because 12172727 - 2² = 12172723 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12172727.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12172723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7118 + ... + 8660.

It is an arithmetic number, because the mean of its divisors is an integer number (926400).

Almost surely, 2^12172727 is an apocalyptic number.

12172727 is a deficient number, since it is larger than the sum of its proper divisors (2649673).

12172727 is an equidigital number, since it uses as much as digits as its factorization.

12172727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1587 (or 1573 counting only the distinct ones).

The product of its digits is 2744, while the sum is 29.

The square root of 12172727 is about 3488.9435363732. The cubic root of 12172727 is about 230.0360812960.

Adding to 12172727 its reverse (72727121), we get a palindrome (84899848).

The spelling of 12172727 in words is "twelve million, one hundred seventy-two thousand, seven hundred twenty-seven".