71000725 has 24 divisors (see below), whose sum is σ = 91134792. Its totient is φ = 54835200.

The previous prime is 71000719. The next prime is 71000731. The reversal of 71000725 is 52700017.

It is an interprime number because it is at equal distance from previous prime (71000719) and next prime (71000731).

It can be written as a sum of positive squares in 12 ways, for example, as 70711281 + 289444 = 8409^2 + 538^2 .

It is not a de Polignac number, because 71000725 - 2³ = 71000717 is a prime.

It is a super-2 number, since 2×71000725² = 10082205901051250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71000696 and 71000705.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 115519 + ... + 116131.

It is an arithmetic number, because the mean of its divisors is an integer number (3797283).

Almost surely, 2^71000725 is an apocalyptic number.

It is an amenable number.

71000725 is a deficient number, since it is larger than the sum of its proper divisors (20134067).

71000725 is a wasteful number, since it uses less digits than its factorization.

71000725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777 (or 772 counting only the distinct ones).

The product of its (nonzero) digits is 490, while the sum is 22.

The square root of 71000725 is about 8426.1927939016. The cubic root of 71000725 is about 414.0831843708.

The spelling of 71000725 in words is "seventy-one million, seven hundred twenty-five", and thus it is an aban number.