71128951 has 8 divisors (see below), whose sum is σ = 75009200. Its totient is φ = 67262400.

The previous prime is 71128933. The next prime is 71128961. The reversal of 71128951 is 15982117.

It is a happy number.

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

It is a 6-Lehmer number, since φ(71128951) divides (71128951-1)⁶.

It is a cyclic number.

It is not a de Polignac number, because 71128951 - 2⁷ = 71128823 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 (71128961) 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, 8305 + ... + 14533.

It is an arithmetic number, because the mean of its divisors is an integer number (9376150).

Almost surely, 2^71128951 is an apocalyptic number.

71128951 is a deficient number, since it is larger than the sum of its proper divisors (3880249).

71128951 is a wasteful number, since it uses less digits than its factorization.

71128951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6849.

The product of its digits is 5040, while the sum is 34.

The square root of 71128951 is about 8433.7981360713. The cubic root of 71128951 is about 414.3323099904.

The spelling of 71128951 in words is "seventy-one million, one hundred twenty-eight thousand, nine hundred fifty-one".