232420421 has 4 divisors (see below), whose sum is σ = 238702092. Its totient is φ = 226138752.

The previous prime is 232420399. The next prime is 232420429. The reversal of 232420421 is 124024232.

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 102232321 + 130188100 = 10111^2 + 11410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-232420421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 232420393 and 232420402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (232420429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3140780 + ... + 3140853.

It is an arithmetic number, because the mean of its divisors is an integer number (59675523).

Almost surely, 2^232420421 is an apocalyptic number.

It is an amenable number.

232420421 is a deficient number, since it is larger than the sum of its proper divisors (6281671).

232420421 is an equidigital number, since it uses as much as digits as its factorization.

232420421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6281670.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 232420421 is about 15245.3409604377. The cubic root of 232420421 is about 614.8343096951.

Adding to 232420421 its reverse (124024232), we get a palindrome (356444653).

The spelling of 232420421 in words is "two hundred thirty-two million, four hundred twenty thousand, four hundred twenty-one".