256065242 has 12 divisors (see below), whose sum is σ = 405378666. Its totient is φ = 121293720.

The previous prime is 256065221. The next prime is 256065253. The reversal of 256065242 is 242560652.

It can be written as a sum of positive squares in only one way, i.e., 162537001 + 93528241 = 12749^2 + 9671^2 .

It is a junction number, because it is equal to n+sod(n) for n = 256065199 and 256065208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 176609 + ... + 178052.

Almost surely, 2^256065242 is an apocalyptic number.

256065242 is a deficient number, since it is larger than the sum of its proper divisors (149313424).

256065242 is a wasteful number, since it uses less digits than its factorization.

256065242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354701 (or 354682 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 256065242 is about 16002.0386826179. The cubic root of 256065242 is about 635.0143564241.

The spelling of 256065242 in words is "two hundred fifty-six million, sixty-five thousand, two hundred forty-two".