1266254567 has 2 divisors, whose sum is σ = 1266254568. Its totient is φ = 1266254566.

The previous prime is 1266254513. The next prime is 1266254599. The reversal of 1266254567 is 7654526621.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1266254567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1266254467) 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, 633127283 + 633127284.

It is an arithmetic number, because the mean of its divisors is an integer number (633127284).

Almost surely, 2^1266254567 is an apocalyptic number.

1266254567 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266254567 is an equidigital number, since it uses as much as digits as its factorization.

1266254567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 604800, while the sum is 44.

The square root of 1266254567 is about 35584.4708686247. The cubic root of 1266254567 is about 1081.8665045890.

The spelling of 1266254567 in words is "one billion, two hundred sixty-six million, two hundred fifty-four thousand, five hundred sixty-seven".