71051857 has 4 divisors (see below), whose sum is σ = 75231396. Its totient is φ = 66872320.

The previous prime is 71051843. The next prime is 71051873. The reversal of 71051857 is 75815017.

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

It can be written as a sum of positive squares in 2 ways, for example, as 63345681 + 7706176 = 7959^2 + 2776^2 .

It is a cyclic number.

It is not a de Polignac number, because 71051857 - 2¹¹ = 71049809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71052857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2089744 + ... + 2089777.

It is an arithmetic number, because the mean of its divisors is an integer number (18807849).

Almost surely, 2^71051857 is an apocalyptic number.

It is an amenable number.

71051857 is a deficient number, since it is larger than the sum of its proper divisors (4179539).

71051857 is a wasteful number, since it uses less digits than its factorization.

71051857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4179538.

The product of its (nonzero) digits is 9800, while the sum is 34.

The square root of 71051857 is about 8429.2263583321. The cubic root of 71051857 is about 414.1825627963.

The spelling of 71051857 in words is "seventy-one million, fifty-one thousand, eight hundred fifty-seven".