71432545 has 4 divisors (see below), whose sum is σ = 85719060. Its totient is φ = 57146032.

The previous prime is 71432531. The next prime is 71432561. The reversal of 71432545 is 54523417.

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 55368481 + 16064064 = 7441^2 + 4008^2 .

It is a cyclic number.

It is not a de Polignac number, because 71432545 - 2¹¹ = 71430497 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, 7143250 + ... + 7143259.

It is an arithmetic number, because the mean of its divisors is an integer number (21429765).

Almost surely, 2^71432545 is an apocalyptic number.

It is an amenable number.

71432545 is a deficient number, since it is larger than the sum of its proper divisors (14286515).

71432545 is a wasteful number, since it uses less digits than its factorization.

71432545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14286514.

The product of its digits is 16800, while the sum is 31.

The square root of 71432545 is about 8451.7776236718. Note that the first 3 decimals coincide. The cubic root of 71432545 is about 414.9209604155.

The spelling of 71432545 in words is "seventy-one million, four hundred thirty-two thousand, five hundred forty-five".