13424821 has 8 divisors (see below), whose sum is σ = 13871520. Its totient is φ = 12982608.

The previous prime is 13424813. The next prime is 13424837. The reversal of 13424821 is 12842431.

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 13424821 - 2³ = 13424813 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 (13424881) 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 7 ways as a sum of consecutive naturals, for example, 5610 + ... + 7636.

It is an arithmetic number, because the mean of its divisors is an integer number (1733940).

Almost surely, 2^13424821 is an apocalyptic number.

It is an amenable number.

13424821 is a deficient number, since it is larger than the sum of its proper divisors (446699).

13424821 is a wasteful number, since it uses less digits than its factorization.

13424821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2243.

The product of its digits is 1536, while the sum is 25.

The square root of 13424821 is about 3663.9897652695. The cubic root of 13424821 is about 237.6673376559.

The spelling of 13424821 in words is "thirteen million, four hundred twenty-four thousand, eight hundred twenty-one".