261103 has 4 divisors (see below), whose sum is σ = 276480. Its totient is φ = 245728.

The previous prime is 261101. The next prime is 261127. The reversal of 261103 is 301162.

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 261103 - 2¹ = 261101 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 (261101) 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, 7663 + ... + 7696.

It is an arithmetic number, because the mean of its divisors is an integer number (69120).

2²⁶¹¹⁰³ is an apocalyptic number.

261103 is a deficient number, since it is larger than the sum of its proper divisors (15377).

261103 is a wasteful number, since it uses less digits than its factorization.

261103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15376.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 261103 is about 510.9823871720. The cubic root of 261103 is about 63.9151708154.

Adding to 261103 its reverse (301162), we get a palindrome (562265).

The spelling of 261103 in words is "two hundred sixty-one thousand, one hundred three".