12404840421 has 8 divisors (see below), whose sum is σ = 16540829280. Its totient is φ = 8269372592.

The previous prime is 12404840419. The next prime is 12404840471.

12404840421 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12404840421 - 2¹ = 12404840419 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12404840471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70830 + ... + 172703.

It is an arithmetic number, because the mean of its divisors is an integer number (2067603660).

Almost surely, 2^12404840421 is an apocalyptic number.

It is an amenable number.

12404840421 is a deficient number, since it is larger than the sum of its proper divisors (4135988859).

12404840421 is a wasteful number, since it uses less digits than its factorization.

12404840421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260515.

The product of its (nonzero) digits is 8192, while the sum is 30.

The spelling of 12404840421 in words is "twelve billion, four hundred four million, eight hundred forty thousand, four hundred twenty-one".