12406281 has 4 divisors (see below), whose sum is σ = 16541712. Its totient is φ = 8270852.

The previous prime is 12406267. The next prime is 12406307. The reversal of 12406281 is 18260421.

12406281 is digitally balanced in base 2 and base 4, because in such bases 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 a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18260421 = 3 ⋅6086807.

It is a cyclic number.

It is not a de Polignac number, because 12406281 - 2⁶ = 12406217 is a prime.

It is a super-2 number, since 2×12406281² = 307831616501922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12406781) 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, 2067711 + ... + 2067716.

It is an arithmetic number, because the mean of its divisors is an integer number (4135428).

Almost surely, 2^12406281 is an apocalyptic number.

It is an amenable number.

12406281 is a deficient number, since it is larger than the sum of its proper divisors (4135431).

12406281 is an equidigital number, since it uses as much as digits as its factorization.

12406281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4135430.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 12406281 is about 3522.2551014939. The cubic root of 12406281 is about 231.4979793233.

The spelling of 12406281 in words is "twelve million, four hundred six thousand, two hundred eighty-one".