256948061 has 2 divisors, whose sum is σ = 256948062. Its totient is φ = 256948060.

The previous prime is 256947961. The next prime is 256948079. The reversal of 256948061 is 160849652.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 255040900 + 1907161 = 15970^2 + 1381^2 .

It is a cyclic number.

It is not a de Polignac number, because 256948061 - 2¹⁰ = 256947037 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 (256948261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128474030 + 128474031.

It is an arithmetic number, because the mean of its divisors is an integer number (128474031).

Almost surely, 2^256948061 is an apocalyptic number.

It is an amenable number.

256948061 is a deficient number, since it is larger than the sum of its proper divisors (1).

256948061 is an equidigital number, since it uses as much as digits as its factorization.

256948061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 256948061 is about 16029.5995271248. The cubic root of 256948061 is about 635.7432848736.

The spelling of 256948061 in words is "two hundred fifty-six million, nine hundred forty-eight thousand, sixty-one".