71336257 has 4 divisors (see below), whose sum is σ = 72313540. Its totient is φ = 70358976.

The previous prime is 71336231. The next prime is 71336273. The reversal of 71336257 is 75263317.

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 14318656 + 57017601 = 3784^2 + 7551^2 .

It is a cyclic number.

It is not a de Polignac number, because 71336257 - 2⁷ = 71336129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71336227) 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, 488532 + ... + 488677.

It is an arithmetic number, because the mean of its divisors is an integer number (18078385).

Almost surely, 2^71336257 is an apocalyptic number.

It is an amenable number.

71336257 is a deficient number, since it is larger than the sum of its proper divisors (977283).

71336257 is an equidigital number, since it uses as much as digits as its factorization.

71336257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977282.

The product of its digits is 26460, while the sum is 34.

The square root of 71336257 is about 8446.0793863188. The cubic root of 71336257 is about 414.7344447125.

The spelling of 71336257 in words is "seventy-one million, three hundred thirty-six thousand, two hundred fifty-seven".