65405265 has 16 divisors (see below), whose sum is σ = 104779008. Its totient is φ = 34839296.

The previous prime is 65405243. The next prime is 65405267. The reversal of 65405265 is 56250456.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 65405265 - 2⁹ = 65404753 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65405267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12424 + ... + 16886.

It is an arithmetic number, because the mean of its divisors is an integer number (6548688).

Almost surely, 2^65405265 is an apocalyptic number.

It is an amenable number.

65405265 is a deficient number, since it is larger than the sum of its proper divisors (39373743).

65405265 is a wasteful number, since it uses less digits than its factorization.

65405265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5448.

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 65405265 is about 8087.3521624819. The cubic root of 65405265 is about 402.9064654127.

The spelling of 65405265 in words is "sixty-five million, four hundred five thousand, two hundred sixty-five".