12453435421 has 4 divisors (see below), whose sum is σ = 14232497632. Its totient is φ = 10674373212.

The previous prime is 12453435389. The next prime is 12453435437.

12453435421 is nontrivially palindromic in base 10.

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.

It is a cyclic number.

It is not a de Polignac number, because 12453435421 - 2⁵ = 12453435389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12453430421) 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, 889531095 + ... + 889531108.

It is an arithmetic number, because the mean of its divisors is an integer number (3558124408).

Almost surely, 2^12453435421 is an apocalyptic number.

It is an amenable number.

12453435421 is a deficient number, since it is larger than the sum of its proper divisors (1779062211).

12453435421 is an equidigital number, since it uses as much as digits as its factorization.

12453435421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1779062210.

The product of its digits is 57600, while the sum is 34.

The spelling of 12453435421 in words is "twelve billion, four hundred fifty-three million, four hundred thirty-five thousand, four hundred twenty-one".