71255487 has 4 divisors (see below), whose sum is σ = 95007320. Its totient is φ = 47503656.

The previous prime is 71255477. The next prime is 71255489. The reversal of 71255487 is 78455217.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 71255487 - 2²⁰ = 70206911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71255489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11875912 + ... + 11875917.

It is an arithmetic number, because the mean of its divisors is an integer number (23751830).

Almost surely, 2^71255487 is an apocalyptic number.

71255487 is a deficient number, since it is larger than the sum of its proper divisors (23751833).

71255487 is a wasteful number, since it uses less digits than its factorization.

71255487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23751832.

The product of its digits is 78400, while the sum is 39.

The square root of 71255487 is about 8441.2965236390. The cubic root of 71255487 is about 414.5778588325.

The spelling of 71255487 in words is "seventy-one million, two hundred fifty-five thousand, four hundred eighty-seven".