420122421 has 12 divisors (see below), whose sum is σ = 617129760. Its totient is φ = 275334120.

The previous prime is 420122399. The next prime is 420122429. The reversal of 420122421 is 124221024.

420122421 is a `hidden beast` number, since 420 + 1 + 2 + 242 + 1 = 666.

It is not a de Polignac number, because 420122421 - 2¹⁰ = 420121397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420122394 and 420122403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420122429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 395065 + ... + 396126.

It is an arithmetic number, because the mean of its divisors is an integer number (51427480).

Almost surely, 2^420122421 is an apocalyptic number.

It is an amenable number.

420122421 is a deficient number, since it is larger than the sum of its proper divisors (197007339).

420122421 is a wasteful number, since it uses less digits than its factorization.

420122421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791256 (or 791253 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 420122421 is about 20496.8880808771. Note that the first 3 decimals coincide. The cubic root of 420122421 is about 748.9599931810.

Adding to 420122421 its reverse (124221024), we get a palindrome (544343445).

The spelling of 420122421 in words is "four hundred twenty million, one hundred twenty-two thousand, four hundred twenty-one".