13641281 has 4 divisors (see below), whose sum is σ = 14111700. Its totient is φ = 13170864.

The previous prime is 13641269. The next prime is 13641283. The reversal of 13641281 is 18214631.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4879681 + 8761600 = 2209^2 + 2960^2 .

It is a cyclic number.

It is not a de Polignac number, because 13641281 - 2¹⁰ = 13640257 is a prime.

It is a super-2 number, since 2×13641281² = 372169094641922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13641281.

It is not an unprimeable number, because it can be changed into a prime (13641283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235166 + ... + 235223.

It is an arithmetic number, because the mean of its divisors is an integer number (3527925).

Almost surely, 2^13641281 is an apocalyptic number.

It is an amenable number.

13641281 is a deficient number, since it is larger than the sum of its proper divisors (470419).

13641281 is an equidigital number, since it uses as much as digits as its factorization.

13641281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470418.

The product of its digits is 1152, while the sum is 26.

The square root of 13641281 is about 3693.4104835504. The cubic root of 13641281 is about 238.9379051233.

The spelling of 13641281 in words is "thirteen million, six hundred forty-one thousand, two hundred eighty-one".