21141241 has 6 divisors (see below), whose sum is σ = 23238026. Its totient is φ = 19219200.

The previous prime is 21141233. The next prime is 21141257. The reversal of 21141241 is 14214112.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 14402025 + 6739216 = 3795^2 + 2596^2 .

It is not a de Polignac number, because 21141241 - 2³ = 21141233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21141271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 87240 + ... + 87481.

Almost surely, 2^21141241 is an apocalyptic number.

It is an amenable number.

21141241 is a deficient number, since it is larger than the sum of its proper divisors (2096785).

21141241 is a wasteful number, since it uses less digits than its factorization.

21141241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174743 (or 174732 counting only the distinct ones).

The product of its digits is 64, while the sum is 16.

The square root of 21141241 is about 4597.9605261463. The cubic root of 21141241 is about 276.5095650078.

Adding to 21141241 its reverse (14214112), we get a palindrome (35355353).

The spelling of 21141241 in words is "twenty-one million, one hundred forty-one thousand, two hundred forty-one".