420729321 has 8 divisors (see below), whose sum is σ = 561755520. Its totient is φ = 280094672.

The previous prime is 420729319. The next prime is 420729341. The reversal of 420729321 is 123927024.

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 420729321 - 2¹ = 420729319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420729301) 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, 95370 + ... + 99683.

It is an arithmetic number, because the mean of its divisors is an integer number (70219440).

Almost surely, 2^420729321 is an apocalyptic number.

It is an amenable number.

420729321 is a deficient number, since it is larger than the sum of its proper divisors (141026199).

420729321 is a wasteful number, since it uses less digits than its factorization.

420729321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195775.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 420729321 is about 20511.6874244905. The cubic root of 420729321 is about 749.3204636041.

The spelling of 420729321 in words is "four hundred twenty million, seven hundred twenty-nine thousand, three hundred twenty-one".