21414241 has 2 divisors, whose sum is σ = 21414242. Its totient is φ = 21414240.

The previous prime is 21414229. The next prime is 21414257. The reversal of 21414241 is 14241412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20250000 + 1164241 = 4500^2 + 1079^2 .

It is a cyclic number.

It is not a de Polignac number, because 21414241 - 2⁹ = 21413729 is a prime.

It is not a weakly prime, because it can be changed into another prime (21414221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10707120 + 10707121.

It is an arithmetic number, because the mean of its divisors is an integer number (10707121).

Almost surely, 2^21414241 is an apocalyptic number.

It is an amenable number.

21414241 is a deficient number, since it is larger than the sum of its proper divisors (1).

21414241 is an equidigital number, since it uses as much as digits as its factorization.

21414241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 256, while the sum is 19.

The square root of 21414241 is about 4627.5523767970. The cubic root of 21414241 is about 277.6946814497.

Adding to 21414241 its reverse (14241412), we get a palindrome (35655653).

The spelling of 21414241 in words is "twenty-one million, four hundred fourteen thousand, two hundred forty-one".