261235 has 8 divisors (see below), whose sum is σ = 337680. Its totient is φ = 192864.

The previous prime is 261229. The next prime is 261241. The reversal of 261235 is 532162.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (261229) and next prime (261241).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261235 - 2⁹ = 260723 is a prime.

It is a zygodrome in base 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1945 + ... + 2074.

It is an arithmetic number, because the mean of its divisors is an integer number (42210).

2²⁶¹²³⁵ is an apocalyptic number.

261235 is a deficient number, since it is larger than the sum of its proper divisors (76445).

261235 is a wasteful number, since it uses less digits than its factorization.

261235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4037.

The product of its digits is 360, while the sum is 19.

The square root of 261235 is about 511.1115338163. Note that the first 3 decimals coincide. The cubic root of 261235 is about 63.9259397217.

Adding to 261235 its reverse (532162), we get a palindrome (793397).

It can be divided in two parts, 261 and 235, that added together give a triangular number (496 = T₃₁).

The spelling of 261235 in words is "two hundred sixty-one thousand, two hundred thirty-five".