255297705 has 16 divisors (see below), whose sum is σ = 439897920. Its totient is φ = 125684928.

The previous prime is 255297703. The next prime is 255297709. The reversal of 255297705 is 507792552.

It is a happy number.

It is not a de Polignac number, because 255297705 - 2¹ = 255297703 is a prime.

It is not an unprimeable number, because it can be changed into a prime (255297703) 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, 654415 + ... + 654804.

It is an arithmetic number, because the mean of its divisors is an integer number (27493620).

Almost surely, 2^255297705 is an apocalyptic number.

It is an amenable number.

255297705 is a deficient number, since it is larger than the sum of its proper divisors (184600215).

255297705 is a wasteful number, since it uses less digits than its factorization.

255297705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1309240.

The product of its (nonzero) digits is 220500, while the sum is 42.

The square root of 255297705 is about 15978.0382087414. The cubic root of 255297705 is about 634.3792516075.

The spelling of 255297705 in words is "two hundred fifty-five million, two hundred ninety-seven thousand, seven hundred five".