256474345 has 8 divisors (see below), whose sum is σ = 307893960. Its totient is φ = 205096320.

The previous prime is 256474333. The next prime is 256474349. The reversal of 256474345 is 543474652.

It can be written as a sum of positive squares in 4 ways, for example, as 34821801 + 221652544 = 5901^2 + 14888^2 .

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

It is not a de Polignac number, because 256474345 - 2¹¹ = 256472297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256474298 and 256474307.

It is not an unprimeable number, because it can be changed into a prime (256474349) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5341 + ... + 23269.

It is an arithmetic number, because the mean of its divisors is an integer number (38486745).

Almost surely, 2^256474345 is an apocalyptic number.

It is an amenable number.

256474345 is a deficient number, since it is larger than the sum of its proper divisors (51419615).

256474345 is a wasteful number, since it uses less digits than its factorization.

256474345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20795.

The product of its digits is 403200, while the sum is 40.

The square root of 256474345 is about 16014.8164210521. The cubic root of 256474345 is about 635.3523536855.

It can be divided in two parts, 25647 and 4345, that added together give a palindrome (29992).

The spelling of 256474345 in words is "two hundred fifty-six million, four hundred seventy-four thousand, three hundred forty-five".