1205002105 has 4 divisors (see below), whose sum is σ = 1446002532. Its totient is φ = 964001680.

The previous prime is 1205002093. The next prime is 1205002151. The reversal of 1205002105 is 5012005021.

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

It can be written as a sum of positive squares in 2 ways, for example, as 703734784 + 501267321 = 26528^2 + 22389^2 .

It is not a de Polignac number, because 1205002105 - 2¹⁹ = 1204477817 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120500206 + ... + 120500215.

It is an arithmetic number, because the mean of its divisors is an integer number (361500633).

Almost surely, 2^1205002105 is an apocalyptic number.

It is an amenable number.

1205002105 is a deficient number, since it is larger than the sum of its proper divisors (241000427).

1205002105 is an equidigital number, since it uses as much as digits as its factorization.

1205002105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241000426.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 1205002105 is about 34713.1402353633. The cubic root of 1205002105 is about 1064.1330583522.

Adding to 1205002105 its reverse (5012005021), we get a palindrome (6217007126).

The spelling of 1205002105 in words is "one billion, two hundred five million, two thousand, one hundred five".