13287145 has 4 divisors (see below), whose sum is σ = 15944580. Its totient is φ = 10629712.

The previous prime is 13287143. The next prime is 13287151. The reversal of 13287145 is 54178231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54178231 = 883 ⋅61357.

It can be written as a sum of positive squares in 2 ways, for example, as 10478169 + 2808976 = 3237^2 + 1676^2 .

It is a cyclic number.

It is not a de Polignac number, because 13287145 - 2¹ = 13287143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13287143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1328710 + ... + 1328719.

It is an arithmetic number, because the mean of its divisors is an integer number (3986145).

Almost surely, 2^13287145 is an apocalyptic number.

It is an amenable number.

13287145 is a deficient number, since it is larger than the sum of its proper divisors (2657435).

13287145 is an equidigital number, since it uses as much as digits as its factorization.

13287145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2657434.

The product of its digits is 6720, while the sum is 31.

The square root of 13287145 is about 3645.1536318789. The cubic root of 13287145 is about 236.8520918943.

The spelling of 13287145 in words is "thirteen million, two hundred eighty-seven thousand, one hundred forty-five".