261303 has 16 divisors (see below), whose sum is σ = 416256. Its totient is φ = 142560.

The previous prime is 261301. The next prime is 261323. The reversal of 261303 is 303162.

It is not a de Polignac number, because 261303 - 2¹ = 261301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213 + ... + 753.

It is an arithmetic number, because the mean of its divisors is an integer number (26016).

2²⁶¹³⁰³ is an apocalyptic number.

261303 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

261303 is a deficient number, since it is larger than the sum of its proper divisors (154953).

261303 is a wasteful number, since it uses less digits than its factorization.

261303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574.

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

The square root of 261303 is about 511.1780511720. The cubic root of 261303 is about 63.9314859244.

Adding to 261303 its reverse (303162), we get a palindrome (564465).

The spelling of 261303 in words is "two hundred sixty-one thousand, three hundred three".