100071 has 6 divisors (see below), whose sum is σ = 144560. Its totient is φ = 66708.

The previous prime is 100069. The next prime is 100103. The reversal of 100071 is 170001.

It is not a de Polignac number, because 100071 - 2¹ = 100069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 11119 = 100071 / (1 + 0 + 0 + 0 + 7 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100271) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5551 + ... + 5568.

2¹⁰⁰⁰⁷¹ is an apocalyptic number.

100071 is a deficient number, since it is larger than the sum of its proper divisors (44489).

100071 is a wasteful number, since it uses less digits than its factorization.

100071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11125 (or 11122 counting only the distinct ones).

The product of its (nonzero) digits is 7, while the sum is 9.

The square root of 100071 is about 316.3400069545. The cubic root of 100071 is about 46.4268708309.

Adding to 100071 its reverse (170001), we get a palindrome (270072).

The spelling of 100071 in words is "one hundred thousand, seventy-one", and thus it is an iban number.