13544140 has 24 divisors (see below), whose sum is σ = 29106000. Its totient is φ = 5291328.

The previous prime is 13544137. The next prime is 13544143. The reversal of 13544140 is 4144531.

It is an interprime number because it is at equal distance from previous prime (13544137) and next prime (13544143).

It is not an unprimeable number, because it can be changed into a prime (13544143) 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 7 ways as a sum of consecutive naturals, for example, 7015 + ... + 8734.

It is an arithmetic number, because the mean of its divisors is an integer number (1212750).

Almost surely, 2^13544140 is an apocalyptic number.

13544140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13544140 is an abundant number, since it is smaller than the sum of its proper divisors (15561860).

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

13544140 is a wasteful number, since it uses less digits than its factorization.

13544140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15801 (or 15799 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 13544140 is about 3680.2364054501. The cubic root of 13544140 is about 238.3693861490.

Adding to 13544140 its reverse (4144531), we get a palindrome (17688671).

The spelling of 13544140 in words is "thirteen million, five hundred forty-four thousand, one hundred forty".