420682921 has 8 divisors (see below), whose sum is σ = 428248800. Its totient is φ = 413131680.

The previous prime is 420682907. The next prime is 420682937. The reversal of 420682921 is 129286024.

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 420682921 - 2⁷ = 420682793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420682321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66045 + ... + 72133.

It is an arithmetic number, because the mean of its divisors is an integer number (53531100).

Almost surely, 2^420682921 is an apocalyptic number.

It is an amenable number.

420682921 is a deficient number, since it is larger than the sum of its proper divisors (7565879).

420682921 is a wasteful number, since it uses less digits than its factorization.

420682921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7319.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 420682921 is about 20510.5563308263. The cubic root of 420682921 is about 749.2929164014.

The spelling of 420682921 in words is "four hundred twenty million, six hundred eighty-two thousand, nine hundred twenty-one".