261234 has 24 divisors (see below), whose sum is σ = 591552. Its totient is φ = 83160.

The previous prime is 261229. The next prime is 261241. The reversal of 261234 is 432162.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is an unprimeable number.

261234 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99 + ... + 729.

It is an arithmetic number, because the mean of its divisors is an integer number (24648).

2²⁶¹²³⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295776).

261234 is an abundant number, since it is smaller than the sum of its proper divisors (330318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261234 is a wasteful number, since it uses less digits than its factorization.

261234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662 (or 659 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 261234 is about 511.1105555553. The cubic root of 261234 is about 63.9258581527.

Adding to 261234 its reverse (432162), we get a palindrome (693396).

The spelling of 261234 in words is "two hundred sixty-one thousand, two hundred thirty-four".