421301243 has 4 divisors (see below), whose sum is σ = 459601368. Its totient is φ = 383001120.

The previous prime is 421301239. The next prime is 421301261. The reversal of 421301243 is 342103124.

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 421301243 - 2² = 421301239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421301263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19150046 + ... + 19150067.

It is an arithmetic number, because the mean of its divisors is an integer number (114900342).

Almost surely, 2^421301243 is an apocalyptic number.

421301243 is a deficient number, since it is larger than the sum of its proper divisors (38300125).

421301243 is a wasteful number, since it uses less digits than its factorization.

421301243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38300124.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 421301243 is about 20525.6240587223. The cubic root of 421301243 is about 749.6598415982.

Adding to 421301243 its reverse (342103124), we get a palindrome (763404367).

The spelling of 421301243 in words is "four hundred twenty-one million, three hundred one thousand, two hundred forty-three".