21459301 has 2 divisors, whose sum is σ = 21459302. Its totient is φ = 21459300.

The previous prime is 21459281. The next prime is 21459331. The reversal of 21459301 is 10395412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18931201 + 2528100 = 4351^2 + 1590^2 .

It is a cyclic number.

It is not a de Polignac number, because 21459301 - 2⁷ = 21459173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21459331) 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, 10729650 + 10729651.

It is an arithmetic number, because the mean of its divisors is an integer number (10729651).

Almost surely, 2^21459301 is an apocalyptic number.

It is an amenable number.

21459301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21459301 is an equidigital number, since it uses as much as digits as its factorization.

21459301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 21459301 is about 4632.4184828230. The cubic root of 21459301 is about 277.8893207086.

The spelling of 21459301 in words is "twenty-one million, four hundred fifty-nine thousand, three hundred one".