13440105 has 24 divisors (see below), whose sum is σ = 26624832. Its totient is φ = 6143904.

The previous prime is 13440101. The next prime is 13440109. The reversal of 13440105 is 50104431.

It is a happy number.

13440105 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13440101) and next prime (13440109).

It is not a de Polignac number, because 13440105 - 2² = 13440101 is a prime.

It is a super-2 number, since 2×13440105² = 361272844822050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13440101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21019 + ... + 21648.

It is an arithmetic number, because the mean of its divisors is an integer number (1109368).

Almost surely, 2^13440105 is an apocalyptic number.

13440105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13440105 is a deficient number, since it is larger than the sum of its proper divisors (13184727).

13440105 is a wasteful number, since it uses less digits than its factorization.

13440105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42685 (or 42682 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 13440105 is about 3666.0748764857. The cubic root of 13440105 is about 237.7574972674.

Adding to 13440105 its reverse (50104431), we get a palindrome (63544536).

The spelling of 13440105 in words is "thirteen million, four hundred forty thousand, one hundred five".