71151705 has 24 divisors (see below), whose sum is σ = 125660808. Its totient is φ = 37230336.

The previous prime is 71151671. The next prime is 71151709. The reversal of 71151705 is 50715117.

It can be written as a sum of positive squares in 4 ways, for example, as 10732176 + 60419529 = 3276^2 + 7773^2 .

It is not a de Polignac number, because 71151705 - 2⁸ = 71151449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71151709) 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 23 ways as a sum of consecutive naturals, for example, 12532 + ... + 17301.

It is an arithmetic number, because the mean of its divisors is an integer number (5235867).

Almost surely, 2^71151705 is an apocalyptic number.

It is an amenable number.

71151705 is a deficient number, since it is larger than the sum of its proper divisors (54509103).

71151705 is a wasteful number, since it uses less digits than its factorization.

71151705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29897 (or 29894 counting only the distinct ones).

The product of its (nonzero) digits is 1225, while the sum is 27.

The square root of 71151705 is about 8435.1470052394. The cubic root of 71151705 is about 414.3764866213.

The spelling of 71151705 in words is "seventy-one million, one hundred fifty-one thousand, seven hundred five".