71288417 has 4 divisors (see below), whose sum is σ = 71608320. Its totient is φ = 70968516.

The previous prime is 71288407. The next prime is 71288419. The reversal of 71288417 is 71488217.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71288417 - 2¹² = 71284321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71288419) 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, 159617 + ... + 160062.

It is an arithmetic number, because the mean of its divisors is an integer number (17902080).

Almost surely, 2^71288417 is an apocalyptic number.

It is an amenable number.

71288417 is a deficient number, since it is larger than the sum of its proper divisors (319903).

71288417 is a wasteful number, since it uses less digits than its factorization.

71288417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319902.

The product of its digits is 25088, while the sum is 38.

The square root of 71288417 is about 8443.2468280869. The cubic root of 71288417 is about 414.6417133133.

The spelling of 71288417 in words is "seventy-one million, two hundred eighty-eight thousand, four hundred seventeen".