235643 has 4 divisors (see below), whose sum is σ = 239568. Its totient is φ = 231720.

The previous prime is 235621. The next prime is 235661. The reversal of 235643 is 346532.

235643 is nontrivially palindromic in base 7 and base 12.

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

It is a cyclic number.

It is not a de Polignac number, because 235643 - 2¹² = 231547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (235663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1871 + ... + 1992.

It is an arithmetic number, because the mean of its divisors is an integer number (59892).

2²³⁵⁶⁴³ is an apocalyptic number.

235643 is a deficient number, since it is larger than the sum of its proper divisors (3925).

235643 is an equidigital number, since it uses as much as digits as its factorization.

235643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3924.

The product of its digits is 2160, while the sum is 23.

The square root of 235643 is about 485.4307365629. The cubic root of 235643 is about 61.7662897464.

Subtracting 235643 from its reverse (346532), we obtain a square (110889 = 333²).

It can be divided in two parts, 235 and 643, that added together give a palindrome (878).

The spelling of 235643 in words is "two hundred thirty-five thousand, six hundred forty-three".