1267128103 has 2 divisors, whose sum is σ = 1267128104. Its totient is φ = 1267128102.

The previous prime is 1267128101. The next prime is 1267128139. The reversal of 1267128103 is 3018217621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1267128103 - 2¹ = 1267128101 is a prime.

It is a super-2 number, since 2×1267128103² = 3211227258824757218, which contains 22 as substring.

Together with 1267128101, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1267128101) 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, 633564051 + 633564052.

It is an arithmetic number, because the mean of its divisors is an integer number (633564052).

Almost surely, 2^1267128103 is an apocalyptic number.

1267128103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1267128103 is an equidigital number, since it uses as much as digits as its factorization.

1267128103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 1267128103 is about 35596.7428706616. The cubic root of 1267128103 is about 1082.1152255361.

The spelling of 1267128103 in words is "one billion, two hundred sixty-seven million, one hundred twenty-eight thousand, one hundred three".