71605241 has 6 divisors (see below), whose sum is σ = 76065390. Its totient is φ = 67392896.

The previous prime is 71605223. The next prime is 71605253. The reversal of 71605241 is 14250617.

It can be written as a sum of positive squares in 3 ways, for example, as 40691641 + 30913600 = 6379^2 + 5560^2 .

It is not a de Polignac number, because 71605241 - 2²⁶ = 4496377 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71605241.

It is not an unprimeable number, because it can be changed into a prime (71605201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 123596 + ... + 124173.

It is an arithmetic number, because the mean of its divisors is an integer number (12677565).

Almost surely, 2^71605241 is an apocalyptic number.

It is an amenable number.

71605241 is a deficient number, since it is larger than the sum of its proper divisors (4460149).

71605241 is a wasteful number, since it uses less digits than its factorization.

71605241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247803 (or 247786 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 71605241 is about 8461.9880051912. The cubic root of 71605241 is about 415.2550636026.

Adding to 71605241 its reverse (14250617), we get a palindrome (85855858).

The spelling of 71605241 in words is "seventy-one million, six hundred five thousand, two hundred forty-one".