12745231 has 4 divisors (see below), whose sum is σ = 12898872. Its totient is φ = 12591592.

The previous prime is 12745217. The next prime is 12745237. The reversal of 12745231 is 13254721.

It is a happy number.

12745231 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, and also an emirpimes, since its reverse is a distinct semiprime: 13254721 = 317 ⋅41813.

It is a cyclic number.

It is not a de Polignac number, because 12745231 - 2⁵ = 12745199 is a prime.

It is a super-2 number, since 2×12745231² = 324881826486722, 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 = 12745196 and 12745205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12745237) 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, 76696 + ... + 76861.

It is an arithmetic number, because the mean of its divisors is an integer number (3224718).

Almost surely, 2^12745231 is an apocalyptic number.

12745231 is a deficient number, since it is larger than the sum of its proper divisors (153641).

12745231 is an equidigital number, since it uses as much as digits as its factorization.

12745231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153640.

The product of its digits is 1680, while the sum is 25.

The square root of 12745231 is about 3570.0463582424. The cubic root of 12745231 is about 233.5873055492.

Adding to 12745231 its reverse (13254721), we get a palindrome (25999952).

The spelling of 12745231 in words is "twelve million, seven hundred forty-five thousand, two hundred thirty-one".