13581441 has 12 divisors (see below), whose sum is σ = 20250880. Its totient is φ = 8762040.

The previous prime is 13581433. The next prime is 13581457. The reversal of 13581441 is 14418531.

It is a happy number.

13581441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13581441 - 2³ = 13581433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13581481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24061 + ... + 24618.

Almost surely, 2^13581441 is an apocalyptic number.

It is an amenable number.

13581441 is a deficient number, since it is larger than the sum of its proper divisors (6669439).

13581441 is a wasteful number, since it uses less digits than its factorization.

13581441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48716 (or 48713 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 13581441 is about 3685.3006661601. The cubic root of 13581441 is about 238.5880112400.

Adding to 13581441 its reverse (14418531), we get a palindrome (27999972).

The spelling of 13581441 in words is "thirteen million, five hundred eighty-one thousand, four hundred forty-one".