12767231 has 4 divisors (see below), whose sum is σ = 13322352. Its totient is φ = 12212112.

The previous prime is 12767219. The next prime is 12767233. The reversal of 12767231 is 13276721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13276721 = 1237 ⋅10733.

It is a cyclic number.

It is not a de Polignac number, because 12767231 - 2¹⁰ = 12766207 is a prime.

It is a super-2 number, since 2×12767231² = 326004374814722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12767194 and 12767203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12767233) 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 3 ways as a sum of consecutive naturals, for example, 277526 + ... + 277571.

It is an arithmetic number, because the mean of its divisors is an integer number (3330588).

Almost surely, 2^12767231 is an apocalyptic number.

12767231 is a deficient number, since it is larger than the sum of its proper divisors (555121).

12767231 is an equidigital number, since it uses as much as digits as its factorization.

12767231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555120.

The product of its digits is 3528, while the sum is 29.

The square root of 12767231 is about 3573.1262222317. The cubic root of 12767231 is about 233.7216294316.

The spelling of 12767231 in words is "twelve million, seven hundred sixty-seven thousand, two hundred thirty-one".