12420430465 has 4 divisors (see below), whose sum is σ = 14904516564. Its totient is φ = 9936344368.

The previous prime is 12420430441. The next prime is 12420430471. The reversal of 12420430465 is 56403402421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56403402421 = 1559 ⋅36179219.

It can be written as a sum of positive squares in 2 ways, for example, as 2540865649 + 9879564816 = 50407^2 + 99396^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12420430465 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1242043042 + ... + 1242043051.

It is an arithmetic number, because the mean of its divisors is an integer number (3726129141).

Almost surely, 2^12420430465 is an apocalyptic number.

It is an amenable number.

12420430465 is a deficient number, since it is larger than the sum of its proper divisors (2484086099).

12420430465 is an equidigital number, since it uses as much as digits as its factorization.

12420430465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2484086098.

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 12420430465 its reverse (56403402421), we get a palindrome (68823832886).

The spelling of 12420430465 in words is "twelve billion, four hundred twenty million, four hundred thirty thousand, four hundred sixty-five".