816071 has 4 divisors (see below), whose sum is σ = 817944. Its totient is φ = 814200.

The previous prime is 816047. The next prime is 816077. The reversal of 816071 is 170618.

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

It is a cyclic number.

It is not a de Polignac number, because 816071 - 2¹⁰ = 815047 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816077) 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, 101 + ... + 1281.

It is an arithmetic number, because the mean of its divisors is an integer number (204486).

2⁸¹⁶⁰⁷¹ is an apocalyptic number.

816071 is a deficient number, since it is larger than the sum of its proper divisors (1873).

816071 is a wasteful number, since it uses less digits than its factorization.

816071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1872.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 816071 is about 903.3664815566. The cubic root of 816071 is about 93.4492847445.

Adding to 816071 its reverse (170618), we get a palindrome (986689).

The spelling of 816071 in words is "eight hundred sixteen thousand, seventy-one".