13440145 has 8 divisors (see below), whose sum is σ = 16162920. Its totient is φ = 10728960.

The previous prime is 13440121. The next prime is 13440173. The reversal of 13440145 is 54104431.

It can be written as a sum of positive squares in 4 ways, for example, as 1056784 + 12383361 = 1028^2 + 3519^2 .

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

It is not a de Polignac number, because 13440145 - 2⁹ = 13439633 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96 + ... + 5185.

It is an arithmetic number, because the mean of its divisors is an integer number (2020365).

Almost surely, 2^13440145 is an apocalyptic number.

It is an amenable number.

13440145 is a deficient number, since it is larger than the sum of its proper divisors (2722775).

13440145 is an equidigital number, since it uses as much as digits as its factorization.

13440145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5795.

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

The square root of 13440145 is about 3666.0803319076. The cubic root of 13440145 is about 237.7577331359.

Adding to 13440145 its reverse (54104431), we get a palindrome (67544576).

The spelling of 13440145 in words is "thirteen million, four hundred forty thousand, one hundred forty-five".