20181241 has 4 divisors (see below), whose sum is σ = 20366500. Its totient is φ = 19995984.

The previous prime is 20181229. The next prime is 20181247. The reversal of 20181241 is 14218102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14218102 = 2 ⋅7109051.

It can be written as a sum of positive squares in 2 ways, for example, as 5779216 + 14402025 = 2404^2 + 3795^2 .

It is a cyclic number.

It is not a de Polignac number, because 20181241 - 2⁵ = 20181209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20181247) 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, 92466 + ... + 92683.

It is an arithmetic number, because the mean of its divisors is an integer number (5091625).

Almost surely, 2^20181241 is an apocalyptic number.

It is an amenable number.

20181241 is a deficient number, since it is larger than the sum of its proper divisors (185259).

20181241 is a wasteful number, since it uses less digits than its factorization.

20181241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185258.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 20181241 is about 4492.3536147547. The cubic root of 20181241 is about 272.2592368814.

Adding to 20181241 its reverse (14218102), we get a palindrome (34399343).

The spelling of 20181241 in words is "twenty million, one hundred eighty-one thousand, two hundred forty-one".