256072123 has 2 divisors, whose sum is σ = 256072124. Its totient is φ = 256072122.

The previous prime is 256072109. The next prime is 256072127. The reversal of 256072123 is 321270652.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256072123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256072091 and 256072100.

It is not a weakly prime, because it can be changed into another prime (256072127) 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 as a sum of consecutive naturals, namely, 128036061 + 128036062.

It is an arithmetic number, because the mean of its divisors is an integer number (128036062).

Almost surely, 2^256072123 is an apocalyptic number.

256072123 is a deficient number, since it is larger than the sum of its proper divisors (1).

256072123 is an equidigital number, since it uses as much as digits as its factorization.

256072123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 256072123 is about 16002.2536850282. The cubic root of 256072123 is about 635.0200444207.

It can be divided in two parts, 25607 and 2123, that added together give a triangular number (27730 = T₂₃₅).

The spelling of 256072123 in words is "two hundred fifty-six million, seventy-two thousand, one hundred twenty-three".