13137445 has 8 divisors (see below), whose sum is σ = 15981336. Its totient is φ = 10365696.

The previous prime is 13137437. The next prime is 13137457. The reversal of 13137445 is 54473131.

It can be written as a sum of positive squares in 4 ways, for example, as 3932289 + 9205156 = 1983^2 + 3034^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13137445 - 2³ = 13137437 is a prime.

It is a super-2 number, since 2×13137445² = 345184922256050, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17632 + ... + 18361.

It is an arithmetic number, because the mean of its divisors is an integer number (1997667).

Almost surely, 2^13137445 is an apocalyptic number.

It is an amenable number.

13137445 is a deficient number, since it is larger than the sum of its proper divisors (2843891).

13137445 is an equidigital number, since it uses as much as digits as its factorization.

13137445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36071.

The product of its digits is 5040, while the sum is 28.

The square root of 13137445 is about 3624.5613527708. The cubic root of 13137445 is about 235.9592300060.

The spelling of 13137445 in words is "thirteen million, one hundred thirty-seven thousand, four hundred forty-five".