256752065 has 8 divisors (see below), whose sum is σ = 316429800. Its totient is φ = 199850112.

The previous prime is 256752061. The next prime is 256752103. The reversal of 256752065 is 560257652.

It can be written as a sum of positive squares in 4 ways, for example, as 117700801 + 139051264 = 10849^2 + 11792^2 .

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 256752065 - 2² = 256752061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256752061) 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, 693740 + ... + 694109.

It is an arithmetic number, because the mean of its divisors is an integer number (39553725).

Almost surely, 2^256752065 is an apocalyptic number.

It is an amenable number.

256752065 is a deficient number, since it is larger than the sum of its proper divisors (59677735).

256752065 is a wasteful number, since it uses less digits than its factorization.

256752065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387891.

The product of its (nonzero) digits is 126000, while the sum is 38.

The square root of 256752065 is about 16023.4847957615. The cubic root of 256752065 is about 635.5815987133.

The spelling of 256752065 in words is "two hundred fifty-six million, seven hundred fifty-two thousand, sixty-five".