420002006 has 4 divisors (see below), whose sum is σ = 630003012. Its totient is φ = 210001002.

The previous prime is 420002003. The next prime is 420002021. The reversal of 420002006 is 600200024.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420002003) 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 as a sum of consecutive naturals, namely, 105000500 + ... + 105000503.

It is an arithmetic number, because the mean of its divisors is an integer number (157500753).

Almost surely, 2^420002006 is an apocalyptic number.

420002006 is a deficient number, since it is larger than the sum of its proper divisors (210001006).

420002006 is a wasteful number, since it uses less digits than its factorization.

420002006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210001005.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 420002006 is about 20493.9504732494. The cubic root of 420002006 is about 748.8884309960. Note that the first 3 decimals are identical.

The spelling of 420002006 in words is "four hundred twenty million, two thousand, six".