816471 has 12 divisors (see below), whose sum is σ = 1194648. Its totient is φ = 537264.

The previous prime is 816469. The next prime is 816499. The reversal of 816471 is 174618.

It is a happy number.

It is not a de Polignac number, because 816471 - 2¹ = 816469 is a prime.

It is a super-3 number, since 3×816471³ = 1632839681097765333, which contains 333 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 201 + ... + 1293.

It is an arithmetic number, because the mean of its divisors is an integer number (99554).

2⁸¹⁶⁴⁷¹ is an apocalyptic number.

816471 is a deficient number, since it is larger than the sum of its proper divisors (378177).

816471 is a wasteful number, since it uses less digits than its factorization.

816471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182 (or 1179 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 816471 is about 903.5878485239. The cubic root of 816471 is about 93.4645504131.

The spelling of 816471 in words is "eight hundred sixteen thousand, four hundred seventy-one".