1205117105 has 8 divisors (see below), whose sum is σ = 1446468864. Its totient is φ = 963874800.

The previous prime is 1205117099. The next prime is 1205117107. The reversal of 1205117105 is 5017115021.

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

It is not a de Polignac number, because 1205117105 - 2⁸ = 1205116849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1205117107) 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, 791 + ... + 49100.

It is an arithmetic number, because the mean of its divisors is an integer number (180808608).

Almost surely, 2^1205117105 is an apocalyptic number.

It is an amenable number.

1205117105 is a deficient number, since it is larger than the sum of its proper divisors (241351759).

1205117105 is an equidigital number, since it uses as much as digits as its factorization.

1205117105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54727.

The product of its (nonzero) digits is 350, while the sum is 23.

The square root of 1205117105 is about 34714.7966291033. The cubic root of 1205117105 is about 1064.1669093052.

The spelling of 1205117105 in words is "one billion, two hundred five million, one hundred seventeen thousand, one hundred five".