126821141 has 2 divisors, whose sum is σ = 126821142. Its totient is φ = 126821140.

The previous prime is 126821137. The next prime is 126821153. The reversal of 126821141 is 141128621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93528241 + 33292900 = 9671^2 + 5770^2 .

It is a cyclic number.

It is not a de Polignac number, because 126821141 - 2² = 126821137 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 126821141.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126821111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63410570 + 63410571.

It is an arithmetic number, because the mean of its divisors is an integer number (63410571).

Almost surely, 2^126821141 is an apocalyptic number.

It is an amenable number.

126821141 is a deficient number, since it is larger than the sum of its proper divisors (1).

126821141 is an equidigital number, since it uses as much as digits as its factorization.

126821141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 26.

The square root of 126821141 is about 11261.4892887220. The cubic root of 126821141 is about 502.4164903344.

Adding to 126821141 its reverse (141128621), we get a palindrome (267949762).

The spelling of 126821141 in words is "one hundred twenty-six million, eight hundred twenty-one thousand, one hundred forty-one".