12404640421 has 8 divisors (see below), whose sum is σ = 13014706688. Its totient is φ = 11807694000.

The previous prime is 12404640403. The next prime is 12404640431.

12404640421 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 12404640421 - 2¹⁷ = 12404509349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12404640421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12404640431) 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, 3278025 + ... + 3281806.

It is an arithmetic number, because the mean of its divisors is an integer number (1626838336).

Almost surely, 2^12404640421 is an apocalyptic number.

It is an amenable number.

12404640421 is a deficient number, since it is larger than the sum of its proper divisors (610066267).

12404640421 is an equidigital number, since it uses as much as digits as its factorization.

12404640421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6559923.

The product of its (nonzero) digits is 6144, while the sum is 28.

The spelling of 12404640421 in words is "twelve billion, four hundred four million, six hundred forty thousand, four hundred twenty-one".