261283 has 4 divisors (see below), whose sum is σ = 285048. Its totient is φ = 237520.

The previous prime is 261281. The next prime is 261301. The reversal of 261283 is 382162.

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

It is a cyclic number.

It is not a de Polignac number, because 261283 - 2¹ = 261281 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261281) 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, 11866 + ... + 11887.

It is an arithmetic number, because the mean of its divisors is an integer number (71262).

2²⁶¹²⁸³ is an apocalyptic number.

261283 is a deficient number, since it is larger than the sum of its proper divisors (23765).

261283 is a wasteful number, since it uses less digits than its factorization.

261283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23764.

The product of its digits is 576, while the sum is 22.

The square root of 261283 is about 511.1584881424. The cubic root of 261283 is about 63.9298547882.

The spelling of 261283 in words is "two hundred sixty-one thousand, two hundred eighty-three".