13115745 has 24 divisors (see below), whose sum is σ = 22853376. Its totient is φ = 6958368.

The previous prime is 13115737. The next prime is 13115747. The reversal of 13115745 is 54751131.

It is not a de Polignac number, because 13115745 - 2³ = 13115737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13115747) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9382 + ... + 10688.

It is an arithmetic number, because the mean of its divisors is an integer number (952224).

Almost surely, 2^13115745 is an apocalyptic number.

13115745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13115745 is a deficient number, since it is larger than the sum of its proper divisors (9737631).

13115745 is a wasteful number, since it uses less digits than its factorization.

13115745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1541 (or 1538 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 13115745 is about 3621.5666499458. The cubic root of 13115745 is about 235.8292418418.

Adding to 13115745 its reverse (54751131), we get a palindrome (67866876).

It can be divided in two parts, 1311 and 5745, that added together give a square (7056 = 84²).

The spelling of 13115745 in words is "thirteen million, one hundred fifteen thousand, seven hundred forty-five".