71280017 has 8 divisors (see below), whose sum is σ = 73731840. Its totient is φ = 68862240.

The previous prime is 71280007. The next prime is 71280037. The reversal of 71280017 is 71008217.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71280017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71280007) 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, 4217 + ... + 12662.

It is an arithmetic number, because the mean of its divisors is an integer number (9216480).

Almost surely, 2^71280017 is an apocalyptic number.

It is an amenable number.

71280017 is a deficient number, since it is larger than the sum of its proper divisors (2451823).

71280017 is a wasteful number, since it uses less digits than its factorization.

71280017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17023.

The product of its (nonzero) digits is 784, while the sum is 26.

The square root of 71280017 is about 8442.7493744633. The cubic root of 71280017 is about 414.6254267628.

The spelling of 71280017 in words is "seventy-one million, two hundred eighty thousand, seventeen".