421042223 has 16 divisors (see below), whose sum is σ = 508485120. Its totient is φ = 340570656.

The previous prime is 421042207. The next prime is 421042249. The reversal of 421042223 is 322240124.

It is a cyclic number.

It is not a de Polignac number, because 421042223 - 2⁴ = 421042207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421042195 and 421042204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421042273) 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 15 ways as a sum of consecutive naturals, for example, 28961 + ... + 40997.

It is an arithmetic number, because the mean of its divisors is an integer number (31780320).

Almost surely, 2^421042223 is an apocalyptic number.

421042223 is a deficient number, since it is larger than the sum of its proper divisors (87442897).

421042223 is a wasteful number, since it uses less digits than its factorization.

421042223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12326.

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

The square root of 421042223 is about 20519.3134144396. The cubic root of 421042223 is about 749.5061774423.

Adding to 421042223 its reverse (322240124), we get a palindrome (743282347).

The spelling of 421042223 in words is "four hundred twenty-one million, forty-two thousand, two hundred twenty-three".