21246053 has 2 divisors, whose sum is σ = 21246054. Its totient is φ = 21246052.

The previous prime is 21245981. The next prime is 21246079. The reversal of 21246053 is 35064212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20232004 + 1014049 = 4498^2 + 1007^2 .

It is a cyclic number.

It is not a de Polignac number, because 21246053 - 2⁸ = 21245797 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 (21246353) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10623026 + 10623027.

It is an arithmetic number, because the mean of its divisors is an integer number (10623027).

Almost surely, 2^21246053 is an apocalyptic number.

It is an amenable number.

21246053 is a deficient number, since it is larger than the sum of its proper divisors (1).

21246053 is an equidigital number, since it uses as much as digits as its factorization.

21246053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 21246053 is about 4609.3440965066. The cubic root of 21246053 is about 276.9657627318.

The spelling of 21246053 in words is "twenty-one million, two hundred forty-six thousand, fifty-three".