13135281 has 8 divisors (see below), whose sum is σ = 17684160. Its totient is φ = 8671632.

The previous prime is 13135279. The next prime is 13135301. The reversal of 13135281 is 18253131.

13135281 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13135281 - 2¹ = 13135279 is a prime.

It is a super-2 number, since 2×13135281² = 345071213897922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13135181) 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, 20946 + ... + 21563.

It is an arithmetic number, because the mean of its divisors is an integer number (2210520).

Almost surely, 2^13135281 is an apocalyptic number.

It is an amenable number.

13135281 is a deficient number, since it is larger than the sum of its proper divisors (4548879).

13135281 is a wasteful number, since it uses less digits than its factorization.

13135281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42615.

The product of its digits is 720, while the sum is 24.

The square root of 13135281 is about 3624.2628215956. The cubic root of 13135281 is about 235.9462735594.

The spelling of 13135281 in words is "thirteen million, one hundred thirty-five thousand, two hundred eighty-one".