256501726 has 8 divisors (see below), whose sum is σ = 414348984. Its totient is φ = 118385400.

The previous prime is 256501717. The next prime is 256501741. The reversal of 256501726 is 627105652.

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

It is a junction number, because it is equal to n+sod(n) for n = 256501691 and 256501700.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4932700 + ... + 4932751.

It is an arithmetic number, because the mean of its divisors is an integer number (51793623).

Almost surely, 2^256501726 is an apocalyptic number.

256501726 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

256501726 is a deficient number, since it is larger than the sum of its proper divisors (157847258).

256501726 is a wasteful number, since it uses less digits than its factorization.

256501726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9865466.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 256501726 is about 16015.6712628600. The cubic root of 256501726 is about 635.3749627874.

The spelling of 256501726 in words is "two hundred fifty-six million, five hundred one thousand, seven hundred twenty-six".