235643421 has 8 divisors (see below), whose sum is σ = 338359840. Its totient is φ = 145011312.

The previous prime is 235643413. The next prime is 235643423. The reversal of 235643421 is 124346532.

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

It is not a de Polignac number, because 235643421 - 2³ = 235643413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (235643423) 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 7 ways as a sum of consecutive naturals, for example, 3021031 + ... + 3021108.

It is an arithmetic number, because the mean of its divisors is an integer number (42294980).

Almost surely, 2^235643421 is an apocalyptic number.

It is an amenable number.

235643421 is a deficient number, since it is larger than the sum of its proper divisors (102716419).

235643421 is a wasteful number, since it uses less digits than its factorization.

235643421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6042155.

The product of its digits is 17280, while the sum is 30.

The square root of 235643421 is about 15350.6814506718. The cubic root of 235643421 is about 617.6632653029.

Adding to 235643421 its reverse (124346532), we get a palindrome (359989953).

The spelling of 235643421 in words is "two hundred thirty-five million, six hundred forty-three thousand, four hundred twenty-one".