71140507 has 4 divisors (see below), whose sum is σ = 71538120. Its totient is φ = 70742896.

The previous prime is 71140493. The next prime is 71140513. The reversal of 71140507 is 70504117.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71140507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71140577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198538 + ... + 198895.

It is an arithmetic number, because the mean of its divisors is an integer number (17884530).

Almost surely, 2^71140507 is an apocalyptic number.

71140507 is a deficient number, since it is larger than the sum of its proper divisors (397613).

71140507 is a wasteful number, since it uses less digits than its factorization.

71140507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397612.

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 71140507 is about 8434.4832088279. The cubic root of 71140507 is about 414.3547470095.

The spelling of 71140507 in words is "seventy-one million, one hundred forty thousand, five hundred seven".