816241 has 4 divisors (see below), whose sum is σ = 829684. Its totient is φ = 802800.

The previous prime is 816239. The next prime is 816251. The reversal of 816241 is 142618.

816241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 57600 + 758641 = 240^2 + 871^2 .

It is a cyclic number.

It is not a de Polignac number, because 816241 - 2¹ = 816239 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (816251) 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, 6630 + ... + 6751.

It is an arithmetic number, because the mean of its divisors is an integer number (207421).

2⁸¹⁶²⁴¹ is an apocalyptic number.

It is an amenable number.

816241 is a deficient number, since it is larger than the sum of its proper divisors (13443).

816241 is a wasteful number, since it uses less digits than its factorization.

816241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13442.

The product of its digits is 384, while the sum is 22.

The square root of 816241 is about 903.4605691451. The cubic root of 816241 is about 93.4557732631.

Adding to 816241 its reverse (142618), we get a palindrome (958859).

It can be divided in two parts, 81 and 6241, that multiplied together give a square (505521 = 711²).

The spelling of 816241 in words is "eight hundred sixteen thousand, two hundred forty-one".