12405825431 has 4 divisors (see below), whose sum is σ = 12406048200. Its totient is φ = 12405602664.

The previous prime is 12405825409. The next prime is 12405825449. The reversal of 12405825431 is 13452850421.

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: 13452850421 = 19 ⋅708044759.

It is a cyclic number.

It is not a de Polignac number, because 12405825431 - 2¹⁰ = 12405824407 is a prime.

It is a super-2 number, since 2×12405825431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12405825391 and 12405825400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12405825631) 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, 54560 + ... + 166698.

It is an arithmetic number, because the mean of its divisors is an integer number (3101512050).

Almost surely, 2^12405825431 is an apocalyptic number.

12405825431 is a deficient number, since it is larger than the sum of its proper divisors (222769).

12405825431 is a wasteful number, since it uses less digits than its factorization.

12405825431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222768.

The product of its (nonzero) digits is 38400, while the sum is 35.

The spelling of 12405825431 in words is "twelve billion, four hundred five million, eight hundred twenty-five thousand, four hundred thirty-one".