1200006105 has 8 divisors (see below), whose sum is σ = 1920009792. Its totient is φ = 640003248.

The previous prime is 1200006103. The next prime is 1200006221. The reversal of 1200006105 is 5016000021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1200006105 - 2¹ = 1200006103 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 80000407 = 1200006105 / (1 + 2 + 0 + 0 + 0 + 0 + 6 + 1 + 0 + 5).

1200006105 is a modest number, since divided by 6105 gives 1200 as remainder.

It is not an unprimeable number, because it can be changed into a prime (1200006103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40000189 + ... + 40000218.

It is an arithmetic number, because the mean of its divisors is an integer number (240001224).

Almost surely, 2^1200006105 is an apocalyptic number.

1200006105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1200006105 is a deficient number, since it is larger than the sum of its proper divisors (720003687).

1200006105 is an equidigital number, since it uses as much as digits as its factorization.

1200006105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80000415.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 1200006105 is about 34641.1042693503. The cubic root of 1200006105 is about 1062.6603712714.

Adding to 1200006105 its reverse (5016000021), we get a palindrome (6216006126).

The spelling of 1200006105 in words is "one billion, two hundred million, six thousand, one hundred five".