13600421 has 4 divisors (see below), whose sum is σ = 13609344. Its totient is φ = 13591500.

The previous prime is 13600417. The next prime is 13600453. The reversal of 13600421 is 12400631.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12400631 = 269 ⋅46099.

It is a cyclic number.

It is not a de Polignac number, because 13600421 - 2² = 13600417 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 13600421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13600471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1535 + ... + 5436.

It is an arithmetic number, because the mean of its divisors is an integer number (3402336).

Almost surely, 2^13600421 is an apocalyptic number.

It is an amenable number.

13600421 is a deficient number, since it is larger than the sum of its proper divisors (8923).

13600421 is an equidigital number, since it uses as much as digits as its factorization.

13600421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8922.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 13600421 is about 3687.8748623021. The cubic root of 13600421 is about 238.6991013817.

The spelling of 13600421 in words is "thirteen million, six hundred thousand, four hundred twenty-one".