65122705 has 4 divisors (see below), whose sum is σ = 78147252. Its totient is φ = 52098160.

The previous prime is 65122693. The next prime is 65122741. The reversal of 65122705 is 50722156.

65122705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 15673681 + 49449024 = 3959^2 + 7032^2 .

It is not a de Polignac number, because 65122705 - 2⁹ = 65122193 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, 6512266 + ... + 6512275.

It is an arithmetic number, because the mean of its divisors is an integer number (19536813).

Almost surely, 2^65122705 is an apocalyptic number.

It is an amenable number.

65122705 is a deficient number, since it is larger than the sum of its proper divisors (13024547).

65122705 is a wasteful number, since it uses less digits than its factorization.

65122705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13024546.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 65122705 is about 8069.8640013324. The cubic root of 65122705 is about 402.3254235653.

The spelling of 65122705 in words is "sixty-five million, one hundred twenty-two thousand, seven hundred five".