13136445 has 32 divisors (see below), whose sum is σ = 26691840. Its totient is φ = 6004800.

The previous prime is 13136413. The next prime is 13136447. The reversal of 13136445 is 54463131.

13136445 is a `hidden beast` number, since 1 + 3 + 13 + 644 + 5 = 666.

13136445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13136445 - 2⁵ = 13136413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13136447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6006 + ... + 7895.

It is an arithmetic number, because the mean of its divisors is an integer number (834120).

Almost surely, 2^13136445 is an apocalyptic number.

13136445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13136445 is an abundant number, since it is smaller than the sum of its proper divisors (13555395).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13136445 is a wasteful number, since it uses less digits than its factorization.

13136445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13922 (or 13916 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 13136445 is about 3624.4234024187. The cubic root of 13136445 is about 235.9532429154.

Adding to 13136445 its reverse (54463131), we get a palindrome (67599576).

The spelling of 13136445 in words is "thirteen million, one hundred thirty-six thousand, four hundred forty-five".