421331243 has 8 divisors (see below), whose sum is σ = 431745600. Its totient is φ = 410944968.

The previous prime is 421331231. The next prime is 421331279. The reversal of 421331243 is 342133124.

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 421331243 - 2¹⁰ = 421330219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421330243) 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, 25148 + ... + 38406.

It is an arithmetic number, because the mean of its divisors is an integer number (53968200).

Almost surely, 2^421331243 is an apocalyptic number.

421331243 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

421331243 is a deficient number, since it is larger than the sum of its proper divisors (10414357).

421331243 is a wasteful number, since it uses less digits than its factorization.

421331243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14041.

The product of its digits is 1728, while the sum is 23.

The square root of 421331243 is about 20526.3548395715. The cubic root of 421331243 is about 749.6776350906.

Adding to 421331243 its reverse (342133124), we get a palindrome (763464367).

The spelling of 421331243 in words is "four hundred twenty-one million, three hundred thirty-one thousand, two hundred forty-three".