71205265 has 12 divisors (see below), whose sum is σ = 90770076. Its totient is φ = 53612288.

The previous prime is 71205259. The next prime is 71205269. The reversal of 71205265 is 56250217.

It can be written as a sum of positive squares in 6 ways, for example, as 8288641 + 62916624 = 2879^2 + 7932^2 .

It is not a de Polignac number, because 71205265 - 2⁹ = 71204753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71205269) 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 11 ways as a sum of consecutive naturals, for example, 23194 + ... + 26083.

It is an arithmetic number, because the mean of its divisors is an integer number (7564173).

Almost surely, 2^71205265 is an apocalyptic number.

It is an amenable number.

71205265 is a deficient number, since it is larger than the sum of its proper divisors (19564811).

71205265 is a wasteful number, since it uses less digits than its factorization.

71205265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49316 (or 49299 counting only the distinct ones).

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

The square root of 71205265 is about 8438.3212192947. The cubic root of 71205265 is about 414.4804355853.

The spelling of 71205265 in words is "seventy-one million, two hundred five thousand, two hundred sixty-five".