13009421 has 8 divisors (see below), whose sum is σ = 13637184. Its totient is φ = 12386880.

The previous prime is 13009391. The next prime is 13009439. The reversal of 13009421 is 12490031.

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

It is not a de Polignac number, because 13009421 - 2¹⁴ = 12993037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13009393 and 13009402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13009021) 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, 4370 + ... + 6716.

It is an arithmetic number, because the mean of its divisors is an integer number (1704648).

Almost surely, 2^13009421 is an apocalyptic number.

It is an amenable number.

13009421 is a deficient number, since it is larger than the sum of its proper divisors (627763).

13009421 is a wasteful number, since it uses less digits than its factorization.

13009421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2611.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 13009421 is about 3606.8574964919. The cubic root of 13009421 is about 235.1902548622.

Adding to 13009421 its reverse (12490031), we get a palindrome (25499452).

The spelling of 13009421 in words is "thirteen million, nine thousand, four hundred twenty-one".