12157267 has 4 divisors (see below), whose sum is σ = 12195936. Its totient is φ = 12118600.

The previous prime is 12157247. The next prime is 12157273. The reversal of 12157267 is 76275121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76275121 = 13 ⋅5867317.

It is a cyclic number.

It is not a de Polignac number, because 12157267 - 2⁷ = 12157139 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12157237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18859 + ... + 19492.

It is an arithmetic number, because the mean of its divisors is an integer number (3048984).

Almost surely, 2^12157267 is an apocalyptic number.

12157267 is a deficient number, since it is larger than the sum of its proper divisors (38669).

12157267 is an equidigital number, since it uses as much as digits as its factorization.

12157267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38668.

The product of its digits is 5880, while the sum is 31.

The square root of 12157267 is about 3486.7272620611. The cubic root of 12157267 is about 229.9386540866.

The spelling of 12157267 in words is "twelve million, one hundred fifty-seven thousand, two hundred sixty-seven".