13581340 has 12 divisors (see below), whose sum is σ = 28520856. Its totient is φ = 5432528.

The previous prime is 13581319. The next prime is 13581349. The reversal of 13581340 is 4318531.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13581349) 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 3 ways as a sum of consecutive naturals, for example, 339514 + ... + 339553.

It is an arithmetic number, because the mean of its divisors is an integer number (2376738).

Almost surely, 2^13581340 is an apocalyptic number.

13581340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13581340 is an abundant number, since it is smaller than the sum of its proper divisors (14939516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13581340 is a wasteful number, since it uses less digits than its factorization.

13581340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679076 (or 679074 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 13581340 is about 3685.2869630464. The cubic root of 13581340 is about 238.5874198092.

Adding to 13581340 its reverse (4318531), we get a palindrome (17899871).

The spelling of 13581340 in words is "thirteen million, five hundred eighty-one thousand, three hundred forty".