71075251 has 4 divisors (see below), whose sum is σ = 76542592. Its totient is φ = 65607912.

The previous prime is 71075203. The next prime is 71075269. The reversal of 71075251 is 15257017.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71075251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71075051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2733651 + ... + 2733676.

It is an arithmetic number, because the mean of its divisors is an integer number (19135648).

Almost surely, 2^71075251 is an apocalyptic number.

71075251 is a deficient number, since it is larger than the sum of its proper divisors (5467341).

71075251 is a wasteful number, since it uses less digits than its factorization.

71075251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5467340.

The product of its (nonzero) digits is 2450, while the sum is 28.

The square root of 71075251 is about 8430.6139159613. The cubic root of 71075251 is about 414.2280146867.

The spelling of 71075251 in words is "seventy-one million, seventy-five thousand, two hundred fifty-one".