261883 has 4 divisors (see below), whose sum is σ = 263160. Its totient is φ = 260608.

The previous prime is 261881. The next prime is 261887. The reversal of 261883 is 388162.

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 261883 - 2¹ = 261881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261881) 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, 253 + ... + 766.

It is an arithmetic number, because the mean of its divisors is an integer number (65790).

261883 is a Friedman number, since it can be written as (8*8)^3-261, using all its digits and the basic arithmetic operations.

2²⁶¹⁸⁸³ is an apocalyptic number.

261883 is a deficient number, since it is larger than the sum of its proper divisors (1277).

261883 is a wasteful number, since it uses less digits than its factorization.

261883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276.

The product of its digits is 2304, while the sum is 28.

The square root of 261883 is about 511.7450537133. The cubic root of 261883 is about 63.9787527125.

It can be divided in two parts, 2618 and 83, that added together give a triangular number (2701 = T₇₃).

The spelling of 261883 in words is "two hundred sixty-one thousand, eight hundred eighty-three".