12405022451 has 4 divisors (see below), whose sum is σ = 13134729672. Its totient is φ = 11675315232.

The previous prime is 12405022439. The next prime is 12405022453. The reversal of 12405022451 is 15422050421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15422050421 = 193 ⋅79906997.

It is a cyclic number.

It is not a de Polignac number, because 12405022451 - 2¹⁴ = 12405006067 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12405022451.

It is not an unprimeable number, because it can be changed into a prime (12405022453) 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, 364853585 + ... + 364853618.

It is an arithmetic number, because the mean of its divisors is an integer number (3283682418).

Almost surely, 2^12405022451 is an apocalyptic number.

12405022451 is a deficient number, since it is larger than the sum of its proper divisors (729707221).

12405022451 is an equidigital number, since it uses as much as digits as its factorization.

12405022451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729707220.

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 12405022451 its reverse (15422050421), we get a palindrome (27827072872).

The spelling of 12405022451 in words is "twelve billion, four hundred five million, twenty-two thousand, four hundred fifty-one".