12187967 has 8 divisors (see below), whose sum is σ = 13407312. Its totient is φ = 11078760.

The previous prime is 12187951. The next prime is 12188003. The reversal of 12187967 is 76978121.

It is not a de Polignac number, because 12187967 - 2⁴ = 12187951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12187067) 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 7 ways as a sum of consecutive naturals, for example, 3248 + ... + 5909.

It is an arithmetic number, because the mean of its divisors is an integer number (1675914).

Almost surely, 2^12187967 is an apocalyptic number.

12187967 is a deficient number, since it is larger than the sum of its proper divisors (1219345).

12187967 is an frugal number, since it uses more digits than its factorization.

12187967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9190 (or 9168 counting only the distinct ones).

The product of its digits is 42336, while the sum is 41.

The square root of 12187967 is about 3491.1268954308. The cubic root of 12187967 is about 230.1320413837.

It can be divided in two parts, 121 and 87967, that added together give a palindrome (88088).

The spelling of 12187967 in words is "twelve million, one hundred eighty-seven thousand, nine hundred sixty-seven".