421344447 has 8 divisors (see below), whose sum is σ = 561962544. Its totient is φ = 280811328.

The previous prime is 421344421. The next prime is 421344449. The reversal of 421344447 is 744443124.

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

It is not a de Polignac number, because 421344447 - 2¹² = 421340351 is a prime.

It is a super-2 number, since 2×421344447² = 355062286035471618, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421344449) 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 7 ways as a sum of consecutive naturals, for example, 8598 + ... + 30275.

It is an arithmetic number, because the mean of its divisors is an integer number (70245318).

Almost surely, 2^421344447 is an apocalyptic number.

421344447 is a deficient number, since it is larger than the sum of its proper divisors (140618097).

421344447 is a wasteful number, since it uses less digits than its factorization.

421344447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42489.

The product of its digits is 43008, while the sum is 33.

The square root of 421344447 is about 20526.6764723372. The cubic root of 421344447 is about 749.6854663321.

The spelling of 421344447 in words is "four hundred twenty-one million, three hundred forty-four thousand, four hundred forty-seven".