256144039 has 2 divisors, whose sum is σ = 256144040. Its totient is φ = 256144038.

The previous prime is 256144027. The next prime is 256144043. The reversal of 256144039 is 930441652.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256144039 - 2⁹ = 256143527 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256143995 and 256144013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256144139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128072019 + 128072020.

It is an arithmetic number, because the mean of its divisors is an integer number (128072020).

Almost surely, 2^256144039 is an apocalyptic number.

256144039 is a deficient number, since it is larger than the sum of its proper divisors (1).

256144039 is an equidigital number, since it uses as much as digits as its factorization.

256144039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 256144039 is about 16004.5005857727. The cubic root of 256144039 is about 635.0794857823.

The spelling of 256144039 in words is "two hundred fifty-six million, one hundred forty-four thousand, thirty-nine".