13261305 has 8 divisors (see below), whose sum is σ = 21218112. Its totient is φ = 7072688.

The previous prime is 13261291. The next prime is 13261307. The reversal of 13261305 is 50316231.

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 13261305 - 2¹⁷ = 13130233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13261307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 442029 + ... + 442058.

It is an arithmetic number, because the mean of its divisors is an integer number (2652264).

Almost surely, 2^13261305 is an apocalyptic number.

13261305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13261305 is a deficient number, since it is larger than the sum of its proper divisors (7956807).

13261305 is an equidigital number, since it uses as much as digits as its factorization.

13261305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884095.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 13261305 is about 3641.6074747287. The cubic root of 13261305 is about 236.6984539287.

Adding to 13261305 its reverse (50316231), we get a palindrome (63577536).

The spelling of 13261305 in words is "thirteen million, two hundred sixty-one thousand, three hundred five".