71052287 has 8 divisors (see below), whose sum is σ = 72176640. Its totient is φ = 69932160.

The previous prime is 71052283. The next prime is 71052307. The reversal of 71052287 is 78225017.

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

It is a cyclic number.

It is not a de Polignac number, because 71052287 - 2² = 71052283 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 (71052283) 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 7 ways as a sum of consecutive naturals, for example, 54914 + ... + 56192.

It is an arithmetic number, because the mean of its divisors is an integer number (9022080).

Almost surely, 2^71052287 is an apocalyptic number.

71052287 is a deficient number, since it is larger than the sum of its proper divisors (1124353).

71052287 is a wasteful number, since it uses less digits than its factorization.

71052287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2113.

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 71052287 is about 8429.2518647861. The cubic root of 71052287 is about 414.1833983275.

The spelling of 71052287 in words is "seventy-one million, fifty-two thousand, two hundred eighty-seven".