256261706 has 8 divisors (see below), whose sum is σ = 407003940. Its totient is φ = 120593728.

The previous prime is 256261697. The next prime is 256261711. The reversal of 256261706 is 607162652.

It can be written as a sum of positive squares in 2 ways, for example, as 254115481 + 2146225 = 15941^2 + 1465^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3768521 + ... + 3768588.

Almost surely, 2^256261706 is an apocalyptic number.

256261706 is a deficient number, since it is larger than the sum of its proper divisors (150742234).

256261706 is a wasteful number, since it uses less digits than its factorization.

256261706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7537128.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 256261706 is about 16008.1762234178. The cubic root of 256261706 is about 635.1767181290.

The spelling of 256261706 in words is "two hundred fifty-six million, two hundred sixty-one thousand, seven hundred six".