13333421 has 8 divisors (see below), whose sum is σ = 14071200. Its totient is φ = 12599280.

The previous prime is 13333409. The next prime is 13333427. The reversal of 13333421 is 12433331.

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

It is a de Polignac number, because none of the positive numbers 2^k-13333421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13333393 and 13333402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13333427) 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, 10235 + ... + 11463.

It is an arithmetic number, because the mean of its divisors is an integer number (1758900).

Almost surely, 2^13333421 is an apocalyptic number.

It is an amenable number.

13333421 is a deficient number, since it is larger than the sum of its proper divisors (737779).

13333421 is a wasteful number, since it uses less digits than its factorization.

13333421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1819.

The product of its digits is 648, while the sum is 20.

The square root of 13333421 is about 3651.4957209341. The cubic root of 13333421 is about 237.1267399998.

Adding to 13333421 its reverse (12433331), we get a palindrome (25766752).

The spelling of 13333421 in words is "thirteen million, three hundred thirty-three thousand, four hundred twenty-one".