261033 has 4 divisors (see below), whose sum is σ = 348048. Its totient is φ = 174020.

The previous prime is 261031. The next prime is 261043. The reversal of 261033 is 330162.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 261033 - 2¹ = 261031 is a prime.

It is a D-number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 261033.

It is not an unprimeable number, because it can be changed into a prime (261031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43503 + ... + 43508.

It is an arithmetic number, because the mean of its divisors is an integer number (87012).

2²⁶¹⁰³³ is an apocalyptic number.

It is an amenable number.

261033 is a deficient number, since it is larger than the sum of its proper divisors (87015).

261033 is an equidigital number, since it uses as much as digits as its factorization.

261033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87014.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 261033 is about 510.9138870690. The cubic root of 261033 is about 63.9094585591.

Adding to 261033 its reverse (330162), we get a palindrome (591195).

It can be divided in two parts, 26103 and 3, that added together give a triangular number (26106 = T₂₂₈).

The spelling of 261033 in words is "two hundred sixty-one thousand, thirty-three".