1205049117 has 4 divisors (see below), whose sum is σ = 1606732160. Its totient is φ = 803366076.

The previous prime is 1205049113. The next prime is 1205049169. The reversal of 1205049117 is 7119405021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1205049117 - 2² = 1205049113 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205049113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200841517 + ... + 200841522.

It is an arithmetic number, because the mean of its divisors is an integer number (401683040).

Almost surely, 2^1205049117 is an apocalyptic number.

It is an amenable number.

1205049117 is a deficient number, since it is larger than the sum of its proper divisors (401683043).

1205049117 is an equidigital number, since it uses as much as digits as its factorization.

1205049117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401683042.

The product of its (nonzero) digits is 2520, while the sum is 30.

The square root of 1205049117 is about 34713.8173786750. The cubic root of 1205049117 is about 1064.1468968820.

The spelling of 1205049117 in words is "one billion, two hundred five million, forty-nine thousand, one hundred seventeen".