13621443 has 8 divisors (see below), whose sum is σ = 19813056. Its totient is φ = 8255400.

The previous prime is 13621429. The next prime is 13621453. The reversal of 13621443 is 34412631.

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

It is not a de Polignac number, because 13621443 - 2⁴ = 13621427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13621453) 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, 206353 + ... + 206418.

It is an arithmetic number, because the mean of its divisors is an integer number (2476632).

Almost surely, 2^13621443 is an apocalyptic number.

13621443 is a deficient number, since it is larger than the sum of its proper divisors (6191613).

13621443 is a wasteful number, since it uses less digits than its factorization.

13621443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412785.

The product of its digits is 1728, while the sum is 24.

The square root of 13621443 is about 3690.7239127304. The cubic root of 13621443 is about 238.8220228056.

The spelling of 13621443 in words is "thirteen million, six hundred twenty-one thousand, four hundred forty-three".