21073141 has 2 divisors, whose sum is σ = 21073142. Its totient is φ = 21073140.

The previous prime is 21073127. The next prime is 21073159. The reversal of 21073141 is 14137012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21068100 + 5041 = 4590^2 + 71^2 .

It is a cyclic number.

It is not a de Polignac number, because 21073141 - 2⁹ = 21072629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21073181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10536570 + 10536571.

It is an arithmetic number, because the mean of its divisors is an integer number (10536571).

Almost surely, 2^21073141 is an apocalyptic number.

It is an amenable number.

21073141 is a deficient number, since it is larger than the sum of its proper divisors (1).

21073141 is an equidigital number, since it uses as much as digits as its factorization.

21073141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 21073141 is about 4590.5490956965. The cubic root of 21073141 is about 276.2123488335.

The spelling of 21073141 in words is "twenty-one million, seventy-three thousand, one hundred forty-one".