1265732099 has 2 divisors, whose sum is σ = 1265732100. Its totient is φ = 1265732098.

The previous prime is 1265732071. The next prime is 1265732107. The reversal of 1265732099 is 9902375621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1265732099 - 2²⁰ = 1264683523 is a prime.

It is not a weakly prime, because it can be changed into another prime (1265732029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632866049 + 632866050.

It is an arithmetic number, because the mean of its divisors is an integer number (632866050).

Almost surely, 2^1265732099 is an apocalyptic number.

1265732099 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265732099 is an equidigital number, since it uses as much as digits as its factorization.

1265732099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 1265732099 is about 35577.1288751636. The cubic root of 1265732099 is about 1081.7176881760.

The spelling of 1265732099 in words is "one billion, two hundred sixty-five million, seven hundred thirty-two thousand, ninety-nine".