256212041 has 2 divisors, whose sum is σ = 256212042. Its totient is φ = 256212040.

The previous prime is 256212031. The next prime is 256212079. The reversal of 256212041 is 140212652.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 255328441 + 883600 = 15979^2 + 940^2 .

It is a cyclic number.

It is not a de Polignac number, because 256212041 - 2¹⁰ = 256211017 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 256211998 and 256212016.

It is not a weakly prime, because it can be changed into another prime (256212031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128106020 + 128106021.

It is an arithmetic number, because the mean of its divisors is an integer number (128106021).

Almost surely, 2^256212041 is an apocalyptic number.

It is an amenable number.

256212041 is a deficient number, since it is larger than the sum of its proper divisors (1).

256212041 is an equidigital number, since it uses as much as digits as its factorization.

256212041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 256212041 is about 16006.6249097054. The cubic root of 256212041 is about 635.1356818379.

Adding to 256212041 its reverse (140212652), we get a palindrome (396424693).

The spelling of 256212041 in words is "two hundred fifty-six million, two hundred twelve thousand, forty-one".