256467361 has 2 divisors, whose sum is σ = 256467362. Its totient is φ = 256467360.

The previous prime is 256467347. The next prime is 256467383. The reversal of 256467361 is 163764652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196868961 + 59598400 = 14031^2 + 7720^2 .

It is a cyclic number.

It is not a de Polignac number, because 256467361 - 2¹⁵ = 256434593 is a prime.

It is not a weakly prime, because it can be changed into another prime (256464361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128233680 + 128233681.

It is an arithmetic number, because the mean of its divisors is an integer number (128233681).

Almost surely, 2^256467361 is an apocalyptic number.

It is an amenable number.

256467361 is a deficient number, since it is larger than the sum of its proper divisors (1).

256467361 is an equidigital number, since it uses as much as digits as its factorization.

256467361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 40.

The square root of 256467361 is about 16014.5983714859. The cubic root of 256467361 is about 635.3465865836.

The spelling of 256467361 in words is "two hundred fifty-six million, four hundred sixty-seven thousand, three hundred sixty-one".