235261 has 4 divisors (see below), whose sum is σ = 253372. Its totient is φ = 217152.

The previous prime is 235243. The next prime is 235273. The reversal of 235261 is 162532.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32761 + 202500 = 181^2 + 450^2 .

It is not a de Polignac number, because 235261 - 2⁹ = 234749 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (235211) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 9036 + ... + 9061.

It is an arithmetic number, because the mean of its divisors is an integer number (63343).

2²³⁵²⁶¹ is an apocalyptic number.

It is an amenable number.

235261 is a deficient number, since it is larger than the sum of its proper divisors (18111).

235261 is a wasteful number, since it uses less digits than its factorization.

235261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18110.

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

The square root of 235261 is about 485.0371119822. The cubic root of 235261 is about 61.7328953264.

Adding to 235261 its reverse (162532), we get a palindrome (397793).

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

The spelling of 235261 in words is "two hundred thirty-five thousand, two hundred sixty-one".