830261 has 4 divisors (see below), whose sum is σ = 832524. Its totient is φ = 828000.

The previous prime is 830257. The next prime is 830267. The reversal of 830261 is 162038.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 162038 = 2 ⋅81019.

It can be written as a sum of positive squares in 2 ways, for example, as 180625 + 649636 = 425^2 + 806^2 .

It is a cyclic number.

It is not a de Polignac number, because 830261 - 2² = 830257 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (830267) 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 3 ways as a sum of consecutive naturals, for example, 440 + ... + 1361.

It is an arithmetic number, because the mean of its divisors is an integer number (208131).

2⁸³⁰²⁶¹ is an apocalyptic number.

It is an amenable number.

830261 is a deficient number, since it is larger than the sum of its proper divisors (2263).

830261 is a wasteful number, since it uses less digits than its factorization.

830261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2262.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 830261 is about 911.1865890146. The cubic root of 830261 is about 93.9878134194.

Adding to 830261 its reverse (162038), we get a palindrome (992299).

The spelling of 830261 in words is "eight hundred thirty thousand, two hundred sixty-one".