123256277 has 2 divisors, whose sum is σ = 123256278. Its totient is φ = 123256276.

The previous prime is 123256271. The next prime is 123256321. The reversal of 123256277 is 772652321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115906756 + 7349521 = 10766^2 + 2711^2 .

It is a cyclic number.

It is not a de Polignac number, because 123256277 - 2⁴ = 123256261 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123256271) 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, 61628138 + 61628139.

It is an arithmetic number, because the mean of its divisors is an integer number (61628139).

Almost surely, 2^123256277 is an apocalyptic number.

It is an amenable number.

123256277 is a deficient number, since it is larger than the sum of its proper divisors (1).

123256277 is an equidigital number, since it uses as much as digits as its factorization.

123256277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 35.

The square root of 123256277 is about 11102.0843538500. The cubic root of 123256277 is about 497.6641405143.

The spelling of 123256277 in words is "one hundred twenty-three million, two hundred fifty-six thousand, two hundred seventy-seven".