256169741 has 2 divisors, whose sum is σ = 256169742. Its totient is φ = 256169740.

The previous prime is 256169737. The next prime is 256169807. The reversal of 256169741 is 147961652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 183494116 + 72675625 = 13546^2 + 8525^2 .

It is a cyclic number.

It is not a de Polignac number, because 256169741 - 2² = 256169737 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 (256166741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128084870 + 128084871.

It is an arithmetic number, because the mean of its divisors is an integer number (128084871).

Almost surely, 2^256169741 is an apocalyptic number.

It is an amenable number.

256169741 is a deficient number, since it is larger than the sum of its proper divisors (1).

256169741 is an equidigital number, since it uses as much as digits as its factorization.

256169741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 41.

The square root of 256169741 is about 16005.3035272687. The cubic root of 256169741 is about 635.1007267829.

The spelling of 256169741 in words is "two hundred fifty-six million, one hundred sixty-nine thousand, seven hundred forty-one".