13616421 has 16 divisors (see below), whose sum is σ = 22345344. Its totient is φ = 7182144.

The previous prime is 13616413. The next prime is 13616431. The reversal of 13616421 is 12461631.

It is not a de Polignac number, because 13616421 - 2³ = 13616413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13616391 and 13616400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13616401) 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 15 ways as a sum of consecutive naturals, for example, 24666 + ... + 25211.

It is an arithmetic number, because the mean of its divisors is an integer number (1396584).

Almost surely, 2^13616421 is an apocalyptic number.

It is an amenable number.

13616421 is a deficient number, since it is larger than the sum of its proper divisors (8728923).

13616421 is a wasteful number, since it uses less digits than its factorization.

13616421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49900.

The product of its digits is 864, while the sum is 24.

The square root of 13616421 is about 3690.0434956786. The cubic root of 13616421 is about 238.7926692923.

The spelling of 13616421 in words is "thirteen million, six hundred sixteen thousand, four hundred twenty-one".