256452321 has 8 divisors (see below), whose sum is σ = 346056480. Its totient is φ = 168908192.

The previous prime is 256452299. The next prime is 256452331. The reversal of 256452321 is 123254652.

256452321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256452321 - 2¹⁰ = 256451297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256452331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 514716 + ... + 515213.

It is an arithmetic number, because the mean of its divisors is an integer number (43257060).

Almost surely, 2^256452321 is an apocalyptic number.

It is an amenable number.

256452321 is a deficient number, since it is larger than the sum of its proper divisors (89604159).

256452321 is a wasteful number, since it uses less digits than its factorization.

256452321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030015.

The product of its digits is 14400, while the sum is 30.

The square root of 256452321 is about 16014.1287930377. The cubic root of 256452321 is about 635.3341668102.

It can be divided in two parts, 25645 and 2321, that added together give a triangular number (27966 = T₂₃₆).

The spelling of 256452321 in words is "two hundred fifty-six million, four hundred fifty-two thousand, three hundred twenty-one".