421244243 has 4 divisors (see below), whose sum is σ = 481422000. Its totient is φ = 361066488.

The previous prime is 421244203. The next prime is 421244249. The reversal of 421244243 is 342442124.

It is a happy number.

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 421244243 - 2⁶ = 421244179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421244249) 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, 30088868 + ... + 30088881.

It is an arithmetic number, because the mean of its divisors is an integer number (120355500).

Almost surely, 2^421244243 is an apocalyptic number.

421244243 is a deficient number, since it is larger than the sum of its proper divisors (60177757).

421244243 is an equidigital number, since it uses as much as digits as its factorization.

421244243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60177756.

The product of its digits is 6144, while the sum is 26.

The square root of 421244243 is about 20524.2355034238. The cubic root of 421244243 is about 749.6260316353.

Adding to 421244243 its reverse (342442124), we get a palindrome (763686367).

The spelling of 421244243 in words is "four hundred twenty-one million, two hundred forty-four thousand, two hundred forty-three".