256745201 has 4 divisors (see below), whose sum is σ = 256912500. Its totient is φ = 256577904.

The previous prime is 256745189. The next prime is 256745213. The reversal of 256745201 is 102547652.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (256745189) and next prime (256745213).

It can be written as a sum of positive squares in 2 ways, for example, as 197824225 + 58920976 = 14065^2 + 7676^2 .

It is a cyclic number.

It is not a de Polignac number, because 256745201 - 2¹⁰ = 256744177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256745231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81326 + ... + 84423.

It is an arithmetic number, because the mean of its divisors is an integer number (64228125).

Almost surely, 2^256745201 is an apocalyptic number.

It is an amenable number.

256745201 is a deficient number, since it is larger than the sum of its proper divisors (167299).

256745201 is a wasteful number, since it uses less digits than its factorization.

256745201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167298.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 256745201 is about 16023.2706087116. The cubic root of 256745201 is about 635.5759347914.

The spelling of 256745201 in words is "two hundred fifty-six million, seven hundred forty-five thousand, two hundred one".