71257317 has 8 divisors (see below), whose sum is σ = 95067840. Its totient is φ = 47475840.

The previous prime is 71257279. The next prime is 71257331. The reversal of 71257317 is 71375217.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71257317 - 2¹⁴ = 71240933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71257367) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 684 + ... + 11957.

It is an arithmetic number, because the mean of its divisors is an integer number (11883480).

Almost surely, 2^71257317 is an apocalyptic number.

It is an amenable number.

71257317 is a deficient number, since it is larger than the sum of its proper divisors (23810523).

71257317 is a wasteful number, since it uses less digits than its factorization.

71257317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14523.

The product of its digits is 10290, while the sum is 33.

The square root of 71257317 is about 8441.4049186140. The cubic root of 71257317 is about 414.5814078971.

The spelling of 71257317 in words is "seventy-one million, two hundred fifty-seven thousand, three hundred seventeen".