13641121 has 8 divisors (see below), whose sum is σ = 14722344. Its totient is φ = 12564480.

The previous prime is 13641113. The next prime is 13641127. The reversal of 13641121 is 12114631.

It can be written as a sum of positive squares in 4 ways, for example, as 216225 + 13424896 = 465^2 + 3664^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 13641121 - 2³ = 13641113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13641127) 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, 7515 + ... + 9151.

It is an arithmetic number, because the mean of its divisors is an integer number (1840293).

Almost surely, 2^13641121 is an apocalyptic number.

It is an amenable number.

13641121 is a deficient number, since it is larger than the sum of its proper divisors (1081223).

13641121 is a wasteful number, since it uses less digits than its factorization.

13641121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2291.

The product of its digits is 144, while the sum is 19.

The square root of 13641121 is about 3693.3888232895. The cubic root of 13641121 is about 238.9369709439.

Adding to 13641121 its reverse (12114631), we get a palindrome (25755752).

It can be divided in two parts, 13641 and 121, that multiplied together give a palindrome (1650561).

The spelling of 13641121 in words is "thirteen million, six hundred forty-one thousand, one hundred twenty-one".