420450221 has 8 divisors (see below), whose sum is σ = 444568320. Its totient is φ = 396531072.

The previous prime is 420450211. The next prime is 420450227. The reversal of 420450221 is 122054024.

It is a happy number.

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 420450221 - 2⁶ = 420450157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420450193 and 420450202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420450227) 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, 45380 + ... + 53853.

It is an arithmetic number, because the mean of its divisors is an integer number (55571040).

Almost surely, 2^420450221 is an apocalyptic number.

It is an amenable number.

420450221 is a deficient number, since it is larger than the sum of its proper divisors (24118099).

420450221 is a wasteful number, since it uses less digits than its factorization.

420450221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99475.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 420450221 is about 20504.8828575049. The cubic root of 420450221 is about 749.1547342441.

The spelling of 420450221 in words is "four hundred twenty million, four hundred fifty thousand, two hundred twenty-one".