21282341 has 2 divisors, whose sum is σ = 21282342. Its totient is φ = 21282340.

The previous prime is 21282319. The next prime is 21282343. The reversal of 21282341 is 14328212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20666116 + 616225 = 4546^2 + 785^2 .

It is a cyclic number.

It is not a de Polignac number, because 21282341 - 2¹⁴ = 21265957 is a prime.

Together with 21282343, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21282343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10641170 + 10641171.

It is an arithmetic number, because the mean of its divisors is an integer number (10641171).

Almost surely, 2^21282341 is an apocalyptic number.

It is an amenable number.

21282341 is a deficient number, since it is larger than the sum of its proper divisors (1).

21282341 is an equidigital number, since it uses as much as digits as its factorization.

21282341 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 23.

The square root of 21282341 is about 4613.2787689451. The cubic root of 21282341 is about 277.1233577599.

The spelling of 21282341 in words is "twenty-one million, two hundred eighty-two thousand, three hundred forty-one".