13135866 has 32 divisors (see below), whose sum is σ = 28149120. Its totient is φ = 4071936.

The previous prime is 13135861. The next prime is 13135873. The reversal of 13135866 is 66853131.

It is not an unprimeable number, because it can be changed into a prime (13135861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8355 + ... + 9801.

It is an arithmetic number, because the mean of its divisors is an integer number (879660).

Almost surely, 2^13135866 is an apocalyptic number.

13135866 is an abundant number, since it is smaller than the sum of its proper divisors (15013254).

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

13135866 is a wasteful number, since it uses less digits than its factorization.

13135866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558.

The product of its digits is 12960, while the sum is 33.

The square root of 13135866 is about 3624.3435267645. The cubic root of 13135866 is about 235.9497762511.

Adding to 13135866 its reverse (66853131), we get a palindrome (79988997).

The spelling of 13135866 in words is "thirteen million, one hundred thirty-five thousand, eight hundred sixty-six".