13281057 has 16 divisors (see below), whose sum is σ = 20712000. Its totient is φ = 8387712.

The previous prime is 13281053. The next prime is 13281071. The reversal of 13281057 is 75018231.

It is not a de Polignac number, because 13281057 - 2² = 13281053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 13281057.

It is not an unprimeable number, because it can be changed into a prime (13281053) 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, 12432 + ... + 13457.

It is an arithmetic number, because the mean of its divisors is an integer number (1294500).

Almost surely, 2^13281057 is an apocalyptic number.

It is an amenable number.

13281057 is a deficient number, since it is larger than the sum of its proper divisors (7430943).

13281057 is a wasteful number, since it uses less digits than its factorization.

13281057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25917 (or 25911 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 13281057 is about 3644.3184548006. The cubic root of 13281057 is about 236.8159121677.

Adding to 13281057 its reverse (75018231), we get a palindrome (88299288).

The spelling of 13281057 in words is "thirteen million, two hundred eighty-one thousand, fifty-seven".