420106 has 4 divisors (see below), whose sum is σ = 630162. Its totient is φ = 210052.

The previous prime is 420103. The next prime is 420149. The reversal of 420106 is 601024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 225625 + 194481 = 475^2 + 441^2 .

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (420103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105025 + ... + 105028.

2⁴²⁰¹⁰⁶ is an apocalyptic number.

420106 is a deficient number, since it is larger than the sum of its proper divisors (210056).

420106 is a wasteful number, since it uses less digits than its factorization.

420106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210055.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 420106 is about 648.1558454569. The cubic root of 420106 is about 74.8950235047.

The spelling of 420106 in words is "four hundred twenty thousand, one hundred six".