13440147 has 8 divisors (see below), whose sum is σ = 20480256. Its totient is φ = 7680072.

The previous prime is 13440121. The next prime is 13440173. The reversal of 13440147 is 74104431.

It is an interprime number because it is at equal distance from previous prime (13440121) and next prime (13440173).

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

It is not a de Polignac number, because 13440147 - 2⁶ = 13440083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13440187) 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 7 ways as a sum of consecutive naturals, for example, 319983 + ... + 320024.

It is an arithmetic number, because the mean of its divisors is an integer number (2560032).

Almost surely, 2^13440147 is an apocalyptic number.

13440147 is a deficient number, since it is larger than the sum of its proper divisors (7040109).

13440147 is an equidigital number, since it uses as much as digits as its factorization.

13440147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640017.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 13440147 is about 3666.0806046785. The cubic root of 13440147 is about 237.7577449293.

Adding to 13440147 its reverse (74104431), we get a palindrome (87544578).

The spelling of 13440147 in words is "thirteen million, four hundred forty thousand, one hundred forty-seven".