256125449 has 2 divisors, whose sum is σ = 256125450. Its totient is φ = 256125448.

The previous prime is 256125439. The next prime is 256125469. The reversal of 256125449 is 944521652.

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., 145033849 + 111091600 = 12043^2 + 10540^2 .

It is a cyclic number.

It is not a de Polignac number, because 256125449 - 2²⁰ = 255076873 is a prime.

It is not a weakly prime, because it can be changed into another prime (256125439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128062724 + 128062725.

It is an arithmetic number, because the mean of its divisors is an integer number (128062725).

Almost surely, 2^256125449 is an apocalyptic number.

It is an amenable number.

256125449 is a deficient number, since it is larger than the sum of its proper divisors (1).

256125449 is an equidigital number, since it uses as much as digits as its factorization.

256125449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 38.

The square root of 256125449 is about 16003.9198010987. The cubic root of 256125449 is about 635.0641214931.

The spelling of 256125449 in words is "two hundred fifty-six million, one hundred twenty-five thousand, four hundred forty-nine".