123125287 has 2 divisors, whose sum is σ = 123125288. Its totient is φ = 123125286.

The previous prime is 123125269. The next prime is 123125323. The reversal of 123125287 is 782521321.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123125287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123125207) 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, 61562643 + 61562644.

It is an arithmetic number, because the mean of its divisors is an integer number (61562644).

Almost surely, 2^123125287 is an apocalyptic number.

123125287 is a deficient number, since it is larger than the sum of its proper divisors (1).

123125287 is an equidigital number, since it uses as much as digits as its factorization.

123125287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6720, while the sum is 31.

The square root of 123125287 is about 11096.1834429681. The cubic root of 123125287 is about 497.4877813216.

The spelling of 123125287 in words is "one hundred twenty-three million, one hundred twenty-five thousand, two hundred eighty-seven".