13144765 has 4 divisors (see below), whose sum is σ = 15773724. Its totient is φ = 10515808.

The previous prime is 13144741. The next prime is 13144771. The reversal of 13144765 is 56744131.

13144765 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56744131 = 383 ⋅148157.

It can be written as a sum of positive squares in 2 ways, for example, as 4108729 + 9036036 = 2027^2 + 3006^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13144765 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1314472 + ... + 1314481.

It is an arithmetic number, because the mean of its divisors is an integer number (3943431).

Almost surely, 2^13144765 is an apocalyptic number.

It is an amenable number.

13144765 is a deficient number, since it is larger than the sum of its proper divisors (2628959).

13144765 is an equidigital number, since it uses as much as digits as its factorization.

13144765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2628958.

The product of its digits is 10080, while the sum is 31.

The square root of 13144765 is about 3625.5709895132. The cubic root of 13144765 is about 236.0030462596.

Adding to 13144765 its reverse (56744131), we get a palindrome (69888896).

The spelling of 13144765 in words is "thirteen million, one hundred forty-four thousand, seven hundred sixty-five".