71458745 has 4 divisors (see below), whose sum is σ = 85750500. Its totient is φ = 57166992.

The previous prime is 71458741. The next prime is 71458747. The reversal of 71458745 is 54785417.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54785417 = 19 ⋅2883443.

It can be written as a sum of positive squares in 2 ways, for example, as 28987456 + 42471289 = 5384^2 + 6517^2 .

It is a cyclic number.

It is not a de Polignac number, because 71458745 - 2² = 71458741 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71458741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7145870 + ... + 7145879.

It is an arithmetic number, because the mean of its divisors is an integer number (21437625).

Almost surely, 2^71458745 is an apocalyptic number.

It is an amenable number.

71458745 is a deficient number, since it is larger than the sum of its proper divisors (14291755).

71458745 is a wasteful number, since it uses less digits than its factorization.

71458745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14291754.

The product of its digits is 156800, while the sum is 41.

The square root of 71458745 is about 8453.3274513649. The cubic root of 71458745 is about 414.9716823955.

The spelling of 71458745 in words is "seventy-one million, four hundred fifty-eight thousand, seven hundred forty-five".