13102281 has 6 divisors (see below), whose sum is σ = 18925530. Its totient is φ = 8734848.

The previous prime is 13102277. The next prime is 13102283. The reversal of 13102281 is 18220131.

It can be written as a sum of positive squares in only one way, i.e., 8173881 + 4928400 = 2859^2 + 2220^2 .

It is not a de Polignac number, because 13102281 - 2² = 13102277 is a prime.

It is a super-2 number, since 2×13102281² = 343339534805922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13102283) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 727896 + ... + 727913.

It is an arithmetic number, because the mean of its divisors is an integer number (3154255).

Almost surely, 2^13102281 is an apocalyptic number.

It is an amenable number.

13102281 is a deficient number, since it is larger than the sum of its proper divisors (5823249).

13102281 is a wasteful number, since it uses less digits than its factorization.

13102281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1455815 (or 1455812 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 13102281 is about 3619.7073086094. The cubic root of 13102281 is about 235.7485171851.

The spelling of 13102281 in words is "thirteen million, one hundred two thousand, two hundred eighty-one".