13135447 has 4 divisors (see below), whose sum is σ = 14145880. Its totient is φ = 12125016.

The previous prime is 13135439. The next prime is 13135469. The reversal of 13135447 is 74453131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13135447 - 2³ = 13135439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13135477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505197 + ... + 505222.

It is an arithmetic number, because the mean of its divisors is an integer number (3536470).

Almost surely, 2^13135447 is an apocalyptic number.

13135447 is a deficient number, since it is larger than the sum of its proper divisors (1010433).

13135447 is a wasteful number, since it uses less digits than its factorization.

13135447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010432.

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

The square root of 13135447 is about 3624.2857227321. The cubic root of 13135447 is about 235.9472674962.

Adding to 13135447 its reverse (74453131), we get a palindrome (87588578).

It can be divided in two parts, 13 and 135447, that added together give a triangular number (135460 = T₅₂₀).

The spelling of 13135447 in words is "thirteen million, one hundred thirty-five thousand, four hundred forty-seven".