261304 has 16 divisors (see below), whose sum is σ = 496800. Its totient is φ = 128832.

The previous prime is 261301. The next prime is 261323. The reversal of 261304 is 403162.

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 3 ways as a sum of consecutive naturals, for example, 529 + ... + 895.

It is an arithmetic number, because the mean of its divisors is an integer number (31050).

2²⁶¹³⁰⁴ is an apocalyptic number.

It is an amenable number.

261304 is a deficient number, since it is larger than the sum of its proper divisors (235496).

261304 is a wasteful number, since it uses less digits than its factorization.

261304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462 (or 458 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 261304 is about 511.1790293038. The cubic root of 261304 is about 63.9315674790.

Adding to 261304 its reverse (403162), we get a palindrome (664466).

It can be divided in two parts, 261 and 304, that added together give a palindrome (565).

The spelling of 261304 in words is "two hundred sixty-one thousand, three hundred four".