21411149 has 2 divisors, whose sum is σ = 21411150. Its totient is φ = 21411148.

The previous prime is 21411107. The next prime is 21411161. The reversal of 21411149 is 94111412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11055625 + 10355524 = 3325^2 + 3218^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21411149 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21411199) 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 as a sum of consecutive naturals, namely, 10705574 + 10705575.

It is an arithmetic number, because the mean of its divisors is an integer number (10705575).

Almost surely, 2^21411149 is an apocalyptic number.

It is an amenable number.

21411149 is a deficient number, since it is larger than the sum of its proper divisors (1).

21411149 is an equidigital number, since it uses as much as digits as its factorization.

21411149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 23.

The square root of 21411149 is about 4627.2182788366. The cubic root of 21411149 is about 277.6813153711.

The spelling of 21411149 in words is "twenty-one million, four hundred eleven thousand, one hundred forty-nine".