71152645 has 4 divisors (see below), whose sum is σ = 85383180. Its totient is φ = 56922112.

The previous prime is 71152637. The next prime is 71152661. The reversal of 71152645 is 54625117.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54625117 = 7349 ⋅7433.

It can be written as a sum of positive squares in 2 ways, for example, as 42068196 + 29084449 = 6486^2 + 5393^2 .

It is a cyclic number.

It is not a de Polignac number, because 71152645 - 2³ = 71152637 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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, 7115260 + ... + 7115269.

It is an arithmetic number, because the mean of its divisors is an integer number (21345795).

Almost surely, 2^71152645 is an apocalyptic number.

It is an amenable number.

71152645 is a deficient number, since it is larger than the sum of its proper divisors (14230535).

71152645 is a wasteful number, since it uses less digits than its factorization.

71152645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14230534.

The product of its digits is 8400, while the sum is 31.

The square root of 71152645 is about 8435.2027242977. The cubic root of 71152645 is about 414.3783114180.

The spelling of 71152645 in words is "seventy-one million, one hundred fifty-two thousand, six hundred forty-five".