256241147 has 2 divisors, whose sum is σ = 256241148. Its totient is φ = 256241146.

The previous prime is 256241107. The next prime is 256241149. The reversal of 256241147 is 741142652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256241147 - 2¹⁰ = 256240123 is a prime.

Together with 256241149, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (256241149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128120573 + 128120574.

It is an arithmetic number, because the mean of its divisors is an integer number (128120574).

Almost surely, 2^256241147 is an apocalyptic number.

256241147 is a deficient number, since it is larger than the sum of its proper divisors (1).

256241147 is an equidigital number, since it uses as much as digits as its factorization.

256241147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 32.

The square root of 256241147 is about 16007.5340699309. The cubic root of 256241147 is about 635.1597316563.

Adding to 256241147 its reverse (741142652), we get a palindrome (997383799).

The spelling of 256241147 in words is "two hundred fifty-six million, two hundred forty-one thousand, one hundred forty-seven".