71540417 has 4 divisors (see below), whose sum is σ = 77043540. Its totient is φ = 66037296.

The previous prime is 71540383. The next prime is 71540423. The reversal of 71540417 is 71404517.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71404517 = 8329 ⋅8573.

It can be written as a sum of positive squares in 2 ways, for example, as 9461776 + 62078641 = 3076^2 + 7879^2 .

It is a de Polignac number, because none of the positive numbers 2^k-71540417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71540417.

It is not an unprimeable number, because it can be changed into a prime (71540317) 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, 2751542 + ... + 2751567.

It is an arithmetic number, because the mean of its divisors is an integer number (19260885).

Almost surely, 2^71540417 is an apocalyptic number.

It is an amenable number.

71540417 is a deficient number, since it is larger than the sum of its proper divisors (5503123).

71540417 is a wasteful number, since it uses less digits than its factorization.

71540417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5503122.

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 71540417 is about 8458.1568323128. The cubic root of 71540417 is about 415.1297160674.

The spelling of 71540417 in words is "seventy-one million, five hundred forty thousand, four hundred seventeen".