420625221 has 8 divisors (see below), whose sum is σ = 561025920. Its totient is φ = 280320672.

The previous prime is 420625217. The next prime is 420625277. The reversal of 420625221 is 122526024.

It is a happy number.

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

It is not a de Polignac number, because 420625221 - 2² = 420625217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420625191 and 420625200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420625291) 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, 13120 + ... + 31833.

It is an arithmetic number, because the mean of its divisors is an integer number (70128240).

Almost surely, 2^420625221 is an apocalyptic number.

It is an amenable number.

420625221 is a deficient number, since it is larger than the sum of its proper divisors (140400699).

420625221 is a wasteful number, since it uses less digits than its factorization.

420625221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48075.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 420625221 is about 20509.1496898336. The cubic root of 420625221 is about 749.2586576791.

The spelling of 420625221 in words is "four hundred twenty million, six hundred twenty-five thousand, two hundred twenty-one".