13155601 has 2 divisors, whose sum is σ = 13155602. Its totient is φ = 13155600.

The previous prime is 13155599. The next prime is 13155613. The reversal of 13155601 is 10655131.

13155601 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8994001 + 4161600 = 2999^2 + 2040^2 .

It is an emirp because it is prime and its reverse (10655131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13155601 - 2¹ = 13155599 is a prime.

Together with 13155599, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13155631) by changing a digit.

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 as a sum of consecutive naturals, namely, 6577800 + 6577801.

It is an arithmetic number, because the mean of its divisors is an integer number (6577801).

Almost surely, 2^13155601 is an apocalyptic number.

It is an amenable number.

13155601 is a deficient number, since it is larger than the sum of its proper divisors (1).

13155601 is an equidigital number, since it uses as much as digits as its factorization.

13155601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 13155601 is about 3627.0650669653. The cubic root of 13155601 is about 236.0678788276.

The spelling of 13155601 in words is "thirteen million, one hundred fifty-five thousand, six hundred one".