82101265 has 4 divisors (see below), whose sum is σ = 98521524. Its totient is φ = 65681008.

The previous prime is 82101247. The next prime is 82101269. The reversal of 82101265 is 56210128.

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 45037521 + 37063744 = 6711^2 + 6088^2 .

It is a cyclic number.

It is not a de Polignac number, because 82101265 - 2⁷ = 82101137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82101269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8210122 + ... + 8210131.

It is an arithmetic number, because the mean of its divisors is an integer number (24630381).

Almost surely, 2^82101265 is an apocalyptic number.

It is an amenable number.

82101265 is a deficient number, since it is larger than the sum of its proper divisors (16420259).

82101265 is a wasteful number, since it uses less digits than its factorization.

82101265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16420258.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 82101265 is about 9060.9748371795. The cubic root of 82101265 is about 434.6269139998.

The spelling of 82101265 in words is "eighty-two million, one hundred one thousand, two hundred sixty-five".