13081445 has 24 divisors (see below), whose sum is σ = 17273736. Its totient is φ = 9504768.

The previous prime is 13081433. The next prime is 13081447. The reversal of 13081445 is 54418031.

It can be written as a sum of positive squares in 12 ways, for example, as 10764961 + 2316484 = 3281^2 + 1522^2 .

It is a de Polignac number, because none of the positive numbers 2^k-13081445 is a prime.

It is a super-2 number, since 2×13081445² = 342248406576050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13081447) 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, 95417 + ... + 95553.

It is an arithmetic number, because the mean of its divisors is an integer number (719739).

Almost surely, 2^13081445 is an apocalyptic number.

It is an amenable number.

13081445 is a deficient number, since it is larger than the sum of its proper divisors (4192291).

13081445 is a wasteful number, since it uses less digits than its factorization.

13081445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 13081445 is about 3616.8280301944. The cubic root of 13081445 is about 235.6234839379.

Adding to 13081445 its reverse (54418031), we get a palindrome (67499476).

The spelling of 13081445 in words is "thirteen million, eighty-one thousand, four hundred forty-five".