12269287 has 4 divisors (see below), whose sum is σ = 12308800. Its totient is φ = 12229776.

The previous prime is 12269263. The next prime is 12269321. The reversal of 12269287 is 78296221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78296221 = 337 ⋅232333.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12269287 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 (12267287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19287 + ... + 19912.

It is an arithmetic number, because the mean of its divisors is an integer number (3077200).

Almost surely, 2^12269287 is an apocalyptic number.

12269287 is a deficient number, since it is larger than the sum of its proper divisors (39513).

12269287 is an equidigital number, since it uses as much as digits as its factorization.

12269287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39512.

The product of its digits is 24192, while the sum is 37.

The square root of 12269287 is about 3502.7542020530. The cubic root of 12269287 is about 230.6427327772.

The spelling of 12269287 in words is "twelve million, two hundred sixty-nine thousand, two hundred eighty-seven".