71007 has 4 divisors (see below), whose sum is σ = 94680. Its totient is φ = 47336.
The previous prime is 70999. The next prime is 71011. The reversal of 71007 is 70017.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70017 = 3 ⋅23339.
It is a cyclic number.
It is not a de Polignac number, because 71007 - 23 = 70999 is a prime.
It is a D-number.
It is a plaindrome in base 16.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 71007.
It is not an unprimeable number, because it can be changed into a prime (71707) 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, 11832 + ... + 11837.
It is an arithmetic number, because the mean of its divisors is an integer number (23670).
271007 is an apocalyptic number.
71007 is a deficient number, since it is larger than the sum of its proper divisors (23673).
71007 is a wasteful number, since it uses less digits than its factorization.
71007 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 23672.
The product of its (nonzero) digits is 49, while the sum is 15.
The square root of 71007 is about 266.4713868317. The cubic root of 71007 is about 41.4095382816.
Subtracting from 71007 its reverse (70017), we obtain a triangular number (990 = T44).
The spelling of 71007 in words is "seventy-one thousand, seven", and thus it is an iban number.
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.067 sec. • engine limits •