1267055399 has 2 divisors, whose sum is σ = 1267055400. Its totient is φ = 1267055398.

The previous prime is 1267055381. The next prime is 1267055401. The reversal of 1267055399 is 9935507621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1267055399 - 2⁸ = 1267055143 is a prime.

Together with 1267055401, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1267055359) 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, 633527699 + 633527700.

It is an arithmetic number, because the mean of its divisors is an integer number (633527700).

Almost surely, 2^1267055399 is an apocalyptic number.

1267055399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1267055399 is an equidigital number, since it uses as much as digits as its factorization.

1267055399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 510300, while the sum is 47.

The square root of 1267055399 is about 35595.7216389835. The cubic root of 1267055399 is about 1082.0945289678.

The spelling of 1267055399 in words is "one billion, two hundred sixty-seven million, fifty-five thousand, three hundred ninety-nine".