126665587 has 2 divisors, whose sum is σ = 126665588. Its totient is φ = 126665586.

The previous prime is 126665579. The next prime is 126665593. The reversal of 126665587 is 785566621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126665587 - 2³ = 126665579 is a prime.

It is not a weakly prime, because it can be changed into another prime (126665537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63332793 + 63332794.

It is an arithmetic number, because the mean of its divisors is an integer number (63332794).

Almost surely, 2^126665587 is an apocalyptic number.

126665587 is a deficient number, since it is larger than the sum of its proper divisors (1).

126665587 is an equidigital number, since it uses as much as digits as its factorization.

126665587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 604800, while the sum is 46.

The square root of 126665587 is about 11254.5807118702. The cubic root of 126665587 is about 502.2109912905.

The spelling of 126665587 in words is "one hundred twenty-six million, six hundred sixty-five thousand, five hundred eighty-seven".