1220002006 has 4 divisors (see below), whose sum is σ = 1830003012. Its totient is φ = 610001002.

The previous prime is 1220001973. The next prime is 1220002019. The reversal of 1220002006 is 6002000221.

It is a happy number.

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

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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305000500 + ... + 305000503.

It is an arithmetic number, because the mean of its divisors is an integer number (457500753).

Almost surely, 2^1220002006 is an apocalyptic number.

1220002006 is a deficient number, since it is larger than the sum of its proper divisors (610001006).

1220002006 is an equidigital number, since it uses as much as digits as its factorization.

1220002006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610001005.

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

The square root of 1220002006 is about 34928.5271089406. The cubic root of 1220002006 is about 1068.5303157963.

Adding to 1220002006 its reverse (6002000221), we get a palindrome (7222002227).

The spelling of 1220002006 in words is "one billion, two hundred twenty million, two thousand, six".