816741 has 6 divisors (see below), whose sum is σ = 1179750. Its totient is φ = 544488.

The previous prime is 816709. The next prime is 816743. The reversal of 816741 is 147618.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 772641 + 44100 = 879^2 + 210^2 .

It is not a de Polignac number, because 816741 - 2⁵ = 816709 is a prime.

It is a super-2 number, since 2×816741² = 1334131722162, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a plaindrome in base 12.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45366 + ... + 45383.

It is an arithmetic number, because the mean of its divisors is an integer number (196625).

2⁸¹⁶⁷⁴¹ is an apocalyptic number.

It is an amenable number.

816741 is a deficient number, since it is larger than the sum of its proper divisors (363009).

816741 is a wasteful number, since it uses less digits than its factorization.

816741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90755 (or 90752 counting only the distinct ones).

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

The square root of 816741 is about 903.7372405738. The cubic root of 816741 is about 93.4748519211.

The spelling of 816741 in words is "eight hundred sixteen thousand, seven hundred forty-one".