1255123099 has 2 divisors, whose sum is σ = 1255123100. Its totient is φ = 1255123098.

The previous prime is 1255123063. The next prime is 1255123151. The reversal of 1255123099 is 9903215521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1255123099 - 2¹³ = 1255114907 is a prime.

It is not a weakly prime, because it can be changed into another prime (1255123399) 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, 627561549 + 627561550.

It is an arithmetic number, because the mean of its divisors is an integer number (627561550).

Almost surely, 2^1255123099 is an apocalyptic number.

1255123099 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255123099 is an equidigital number, since it uses as much as digits as its factorization.

1255123099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24300, while the sum is 37.

The square root of 1255123099 is about 35427.7165366327. The cubic root of 1255123099 is about 1078.6869900318.

The spelling of 1255123099 in words is "one billion, two hundred fifty-five million, one hundred twenty-three thousand, ninety-nine".