71251287 has 8 divisors (see below), whose sum is σ = 95041536. Its totient is φ = 47480952.

The previous prime is 71251277. The next prime is 71251321. The reversal of 71251287 is 78215217.

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

It is not a de Polignac number, because 71251287 - 2⁶ = 71251223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71251207) 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, 8908 + ... + 14894.

It is an arithmetic number, because the mean of its divisors is an integer number (11880192).

Almost surely, 2^71251287 is an apocalyptic number.

71251287 is a deficient number, since it is larger than the sum of its proper divisors (23790249).

71251287 is a wasteful number, since it uses less digits than its factorization.

71251287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9957.

The product of its digits is 7840, while the sum is 33.

The square root of 71251287 is about 8441.0477430234. The cubic root of 71251287 is about 414.5697132085.

The spelling of 71251287 in words is "seventy-one million, two hundred fifty-one thousand, two hundred eighty-seven".