235981261 has 4 divisors (see below), whose sum is σ = 236432992. Its totient is φ = 235529532.

The previous prime is 235981247. The next prime is 235981279. The reversal of 235981261 is 162189532.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 235981261 - 2⁷ = 235981133 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 235981261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (235981211) 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, 225081 + ... + 226126.

It is an arithmetic number, because the mean of its divisors is an integer number (59108248).

Almost surely, 2^235981261 is an apocalyptic number.

It is an amenable number.

235981261 is a deficient number, since it is larger than the sum of its proper divisors (451731).

235981261 is an equidigital number, since it uses as much as digits as its factorization.

235981261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451730.

The product of its digits is 25920, while the sum is 37.

The square root of 235981261 is about 15361.6815811291. The cubic root of 235981261 is about 617.9583039006.

The spelling of 235981261 in words is "two hundred thirty-five million, nine hundred eighty-one thousand, two hundred sixty-one".