12405234251 has 4 divisors (see below), whose sum is σ = 12405570600. Its totient is φ = 12404897904.

The previous prime is 12405234211. The next prime is 12405234263. The reversal of 12405234251 is 15243250421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15243250421 = 7 ⋅2177607203.

It is a cyclic number.

It is not a de Polignac number, because 12405234251 - 2⁶ = 12405234187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12405234211) 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, 104921 + ... + 189258.

It is an arithmetic number, because the mean of its divisors is an integer number (3101392650).

Almost surely, 2^12405234251 is an apocalyptic number.

12405234251 is a deficient number, since it is larger than the sum of its proper divisors (336349).

12405234251 is an equidigital number, since it uses as much as digits as its factorization.

12405234251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336348.

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 12405234251 its reverse (15243250421), we get a palindrome (27648484672).

The spelling of 12405234251 in words is "twelve billion, four hundred five million, two hundred thirty-four thousand, two hundred fifty-one".