12231787 has 4 divisors (see below), whose sum is σ = 12239056. Its totient is φ = 12224520.

The previous prime is 12231767. The next prime is 12231827. The reversal of 12231787 is 78713221.

12231787 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 78713221 = 29 ⋅2714249.

It is a cyclic number.

It is not a de Polignac number, because 12231787 - 2¹¹ = 12229739 is a prime.

It is a super-2 number, since 2×12231787² = 299233226426738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12231757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 337 + ... + 4957.

It is an arithmetic number, because the mean of its divisors is an integer number (3059764).

Almost surely, 2^12231787 is an apocalyptic number.

12231787 is a deficient number, since it is larger than the sum of its proper divisors (7269).

12231787 is an equidigital number, since it uses as much as digits as its factorization.

12231787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7268.

The product of its digits is 4704, while the sum is 31.

The square root of 12231787 is about 3497.3971750432. The cubic root of 12231787 is about 230.4075132078.

The spelling of 12231787 in words is "twelve million, two hundred thirty-one thousand, seven hundred eighty-seven".