256925845 has 16 divisors (see below), whose sum is σ = 356125248. Its totient is φ = 175863040.

The previous prime is 256925843. The next prime is 256925849. The reversal of 256925845 is 548529652.

It is a happy number.

It is not a de Polignac number, because 256925845 - 2¹ = 256925843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256925795 and 256925804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256925843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136459 + ... + 138328.

It is an arithmetic number, because the mean of its divisors is an integer number (22257828).

Almost surely, 2^256925845 is an apocalyptic number.

It is an amenable number.

256925845 is a deficient number, since it is larger than the sum of its proper divisors (99199403).

256925845 is a wasteful number, since it uses less digits than its factorization.

256925845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274820.

The product of its digits is 864000, while the sum is 46.

The square root of 256925845 is about 16028.9065441159. The cubic root of 256925845 is about 635.7249620008.

The spelling of 256925845 in words is "two hundred fifty-six million, nine hundred twenty-five thousand, eight hundred forty-five".