12125431 has 4 divisors (see below), whose sum is σ = 12168864. Its totient is φ = 12082000.

The previous prime is 12125423. The next prime is 12125447. The reversal of 12125431 is 13452121.

12125431 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.

It is a cyclic number.

It is not a de Polignac number, because 12125431 - 2³ = 12125423 is a prime.

It is a super-2 number, since 2×12125431² = 294052153871522, 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 = 12125399 and 12125408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12125461) 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, 21295 + ... + 21856.

It is an arithmetic number, because the mean of its divisors is an integer number (3042216).

Almost surely, 2^12125431 is an apocalyptic number.

12125431 is a deficient number, since it is larger than the sum of its proper divisors (43433).

12125431 is an equidigital number, since it uses as much as digits as its factorization.

12125431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43432.

The product of its digits is 240, while the sum is 19.

The square root of 12125431 is about 3482.1589567393. The cubic root of 12125431 is about 229.7377666621.

Adding to 12125431 its reverse (13452121), we get a palindrome (25577552).

It can be divided in two parts, 121 and 25431, that added together give a palindrome (25552).

The spelling of 12125431 in words is "twelve million, one hundred twenty-five thousand, four hundred thirty-one".