71005745 has 4 divisors (see below), whose sum is σ = 85206900. Its totient is φ = 56804592.

The previous prime is 71005721. The next prime is 71005763. The reversal of 71005745 is 54750017.

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 51724864 + 19280881 = 7192^2 + 4391^2 .

It is a cyclic number.

It is not a de Polignac number, because 71005745 - 2¹² = 71001649 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7100570 + ... + 7100579.

It is an arithmetic number, because the mean of its divisors is an integer number (21301725).

Almost surely, 2^71005745 is an apocalyptic number.

It is an amenable number.

71005745 is a deficient number, since it is larger than the sum of its proper divisors (14201155).

71005745 is a wasteful number, since it uses less digits than its factorization.

71005745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14201154.

The product of its (nonzero) digits is 4900, while the sum is 29.

The square root of 71005745 is about 8426.4906693119. The cubic root of 71005745 is about 414.0929431847.

The spelling of 71005745 in words is "seventy-one million, five thousand, seven hundred forty-five".