420403122 has 48 divisors (see below), whose sum is σ = 949620672. Its totient is φ = 139391280.

The previous prime is 420403103. The next prime is 420403127. The reversal of 420403122 is 221304024.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 420403095 and 420403104.

It is not an unprimeable number, because it can be changed into a prime (420403127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93547 + ... + 97937.

It is an arithmetic number, because the mean of its divisors is an integer number (19783764).

Almost surely, 2^420403122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420403122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (474810336).

420403122 is an abundant number, since it is smaller than the sum of its proper divisors (529217550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

420403122 is a wasteful number, since it uses less digits than its factorization.

420403122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4605 (or 4593 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 420403122 is about 20503.7343427972. The cubic root of 420403122 is about 749.1267596630.

Adding to 420403122 its reverse (221304024), we get a palindrome (641707146).

The spelling of 420403122 in words is "four hundred twenty million, four hundred three thousand, one hundred twenty-two".