256452439 has 4 divisors (see below), whose sum is σ = 263383624. Its totient is φ = 249521256.

The previous prime is 256452421. The next prime is 256452451. The reversal of 256452439 is 934254652.

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

It is a cyclic number.

It is not a de Polignac number, because 256452439 - 2¹³ = 256444247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256452239) 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, 3465537 + ... + 3465610.

It is an arithmetic number, because the mean of its divisors is an integer number (65845906).

Almost surely, 2^256452439 is an apocalyptic number.

256452439 is a deficient number, since it is larger than the sum of its proper divisors (6931185).

256452439 is an equidigital number, since it uses as much as digits as its factorization.

256452439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6931184.

The product of its digits is 259200, while the sum is 40.

The square root of 256452439 is about 16014.1324772839. The cubic root of 256452439 is about 635.3342642545.

The spelling of 256452439 in words is "two hundred fifty-six million, four hundred fifty-two thousand, four hundred thirty-nine".