256716123 has 8 divisors (see below), whose sum is σ = 344586000. Its totient is φ = 169995168.

The previous prime is 256716077. The next prime is 256716137. The reversal of 256716123 is 321617652.

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

It is not a de Polignac number, because 256716123 - 2¹⁴ = 256699739 is a prime.

It is a super-2 number, since 2×256716123² = 131806335616302258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256716143) 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, 286708 + ... + 287601.

It is an arithmetic number, because the mean of its divisors is an integer number (43073250).

Almost surely, 2^256716123 is an apocalyptic number.

256716123 is a deficient number, since it is larger than the sum of its proper divisors (87869877).

256716123 is a wasteful number, since it uses less digits than its factorization.

256716123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574461.

The product of its digits is 15120, while the sum is 33.

The square root of 256716123 is about 16022.3632152064. The cubic root of 256716123 is about 635.5519395687.

The spelling of 256716123 in words is "two hundred fifty-six million, seven hundred sixteen thousand, one hundred twenty-three".