12651231 has 4 divisors (see below), whose sum is σ = 16868312. Its totient is φ = 8434152.

The previous prime is 12651227. The next prime is 12651251. The reversal of 12651231 is 13215621.

12651231 is digitally balanced in base 2, 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.

It is not a de Polignac number, because 12651231 - 2² = 12651227 is a prime.

It is a super-2 number, since 2×12651231² = 320107291630722, 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 = 12651198 and 12651207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12651251) 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, 2108536 + ... + 2108541.

It is an arithmetic number, because the mean of its divisors is an integer number (4217078).

Almost surely, 2^12651231 is an apocalyptic number.

12651231 is a deficient number, since it is larger than the sum of its proper divisors (4217081).

12651231 is an equidigital number, since it uses as much as digits as its factorization.

12651231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4217080.

The product of its digits is 360, while the sum is 21.

The square root of 12651231 is about 3556.8568990051. The cubic root of 12651231 is about 233.0116285403.

Adding to 12651231 its reverse (13215621), we get a palindrome (25866852).

The spelling of 12651231 in words is "twelve million, six hundred fifty-one thousand, two hundred thirty-one".