1266452729 has 2 divisors, whose sum is σ = 1266452730. Its totient is φ = 1266452728.

The previous prime is 1266452717. The next prime is 1266452777. The reversal of 1266452729 is 9272546621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 669774400 + 596678329 = 25880^2 + 24427^2 .

It is a cyclic number.

It is not a de Polignac number, because 1266452729 - 2²⁴ = 1249675513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1266452729.

It is not a weakly prime, because it can be changed into another prime (1266452329) 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, 633226364 + 633226365.

It is an arithmetic number, because the mean of its divisors is an integer number (633226365).

Almost surely, 2^1266452729 is an apocalyptic number.

It is an amenable number.

1266452729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266452729 is an equidigital number, since it uses as much as digits as its factorization.

1266452729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 44.

The square root of 1266452729 is about 35587.2551484376. The cubic root of 1266452729 is about 1081.9229370667.

The spelling of 1266452729 in words is "one billion, two hundred sixty-six million, four hundred fifty-two thousand, seven hundred twenty-nine".