126656065 has 4 divisors (see below), whose sum is σ = 151987284. Its totient is φ = 101324848.

The previous prime is 126656051. The next prime is 126656077. The reversal of 126656065 is 560656621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71436304 + 55219761 = 8452^2 + 7431^2 .

It is a cyclic number.

It is not a de Polignac number, because 126656065 - 2²⁵ = 93101633 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 12665602 + ... + 12665611.

It is an arithmetic number, because the mean of its divisors is an integer number (37996821).

Almost surely, 2^126656065 is an apocalyptic number.

It is an amenable number.

126656065 is a deficient number, since it is larger than the sum of its proper divisors (25331219).

126656065 is an equidigital number, since it uses as much as digits as its factorization.

126656065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25331218.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 126656065 is about 11254.1576761657. The cubic root of 126656065 is about 502.1984065177.

The spelling of 126656065 in words is "one hundred twenty-six million, six hundred fifty-six thousand, sixty-five".