13127505 has 16 divisors (see below), whose sum is σ = 21349824. Its totient is φ = 6886080.

The previous prime is 13127501. The next prime is 13127507. The reversal of 13127505 is 50572131.

It is not a de Polignac number, because 13127505 - 2² = 13127501 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13127501) 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 in 15 ways as a sum of consecutive naturals, for example, 6259 + ... + 8088.

It is an arithmetic number, because the mean of its divisors is an integer number (1334364).

Almost surely, 2^13127505 is an apocalyptic number.

13127505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13127505 is a deficient number, since it is larger than the sum of its proper divisors (8222319).

13127505 is a wasteful number, since it uses less digits than its factorization.

13127505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14416.

The product of its (nonzero) digits is 1050, while the sum is 24.

The square root of 13127505 is about 3623.1898928982. The cubic root of 13127505 is about 235.8997048211.

Adding to 13127505 its reverse (50572131), we get a palindrome (63699636).

The spelling of 13127505 in words is "thirteen million, one hundred twenty-seven thousand, five hundred five".