420220123 has 8 divisors (see below), whose sum is σ = 431247168. Its totient is φ = 409250184.

The previous prime is 420220079. The next prime is 420220139. The reversal of 420220123 is 321022024.

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 420220123 - 2²⁵ = 386665691 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420220097 and 420220106.

It is not an unprimeable number, because it can be changed into a prime (420220153) 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, 840 + ... + 29002.

It is an arithmetic number, because the mean of its divisors is an integer number (53905896).

Almost surely, 2^420220123 is an apocalyptic number.

420220123 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

420220123 is a deficient number, since it is larger than the sum of its proper divisors (11027045).

420220123 is a wasteful number, since it uses less digits than its factorization.

420220123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28553.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 420220123 is about 20499.2712797309. The cubic root of 420220123 is about 749.0180470671.

Adding to 420220123 its reverse (321022024), we get a palindrome (741242147).

The spelling of 420220123 in words is "four hundred twenty million, two hundred twenty thousand, one hundred twenty-three".