421213243 has 8 divisors (see below), whose sum is σ = 460004976. Its totient is φ = 382504800.

The previous prime is 421213241. The next prime is 421213271. The reversal of 421213243 is 342312124.

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

It is a cyclic number.

It is not a de Polignac number, because 421213243 - 2¹ = 421213241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421213241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9996 + ... + 30697.

It is an arithmetic number, because the mean of its divisors is an integer number (57500622).

Almost surely, 2^421213243 is an apocalyptic number.

421213243 is a deficient number, since it is larger than the sum of its proper divisors (38791733).

421213243 is a wasteful number, since it uses less digits than its factorization.

421213243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41645.

The product of its digits is 1152, while the sum is 22.

The square root of 421213243 is about 20523.4802847860. The cubic root of 421213243 is about 749.6076424803.

Adding to 421213243 its reverse (342312124), we get a palindrome (763525367).

The spelling of 421213243 in words is "four hundred twenty-one million, two hundred thirteen thousand, two hundred forty-three".