421347543621 has 8 divisors (see below), whose sum is σ = 561873617760. Its totient is φ = 280859915952.

The previous prime is 421347543601. The next prime is 421347543623. The reversal of 421347543621 is 126345743124.

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

It is not a de Polignac number, because 421347543621 - 2⁷ = 421347543493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421347543623) 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, 9586035 + ... + 9629888.

It is an arithmetic number, because the mean of its divisors is an integer number (70234202220).

Almost surely, 2^421347543621 is an apocalyptic number.

It is an amenable number.

421347543621 is a deficient number, since it is larger than the sum of its proper divisors (140526074139).

421347543621 is a wasteful number, since it uses less digits than its factorization.

421347543621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19223235.

The product of its digits is 483840, while the sum is 42.

The spelling of 421347543621 in words is "four hundred twenty-one billion, three hundred forty-seven million, five hundred forty-three thousand, six hundred twenty-one".