126665369 has 2 divisors, whose sum is σ = 126665370. Its totient is φ = 126665368.

The previous prime is 126665353. The next prime is 126665449. The reversal of 126665369 is 963566621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120736144 + 5929225 = 10988^2 + 2435^2 .

It is a cyclic number.

It is not a de Polignac number, because 126665369 - 2⁴ = 126665353 is a prime.

It is a super-2 number, since 2×126665369² = 32088231407812322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (126661369) 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, 63332684 + 63332685.

It is an arithmetic number, because the mean of its divisors is an integer number (63332685).

Almost surely, 2^126665369 is an apocalyptic number.

It is an amenable number.

126665369 is a deficient number, since it is larger than the sum of its proper divisors (1).

126665369 is an equidigital number, since it uses as much as digits as its factorization.

126665369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 349920, while the sum is 44.

The square root of 126665369 is about 11254.5710269206. The cubic root of 126665369 is about 502.2107031774.

The spelling of 126665369 in words is "one hundred twenty-six million, six hundred sixty-five thousand, three hundred sixty-nine".