1205198797 has 8 divisors (see below), whose sum is σ = 1345338720. Its totient is φ = 1070154960.

The previous prime is 1205198783. The next prime is 1205198809. The reversal of 1205198797 is 7978915021.

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

It is a cyclic number.

It is not a de Polignac number, because 1205198797 - 2²³ = 1196810189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1205198797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205198737) 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, 1273522 + ... + 1274467.

It is an arithmetic number, because the mean of its divisors is an integer number (168167340).

Almost surely, 2^1205198797 is an apocalyptic number.

It is an amenable number.

1205198797 is a deficient number, since it is larger than the sum of its proper divisors (140139923).

1205198797 is a wasteful number, since it uses less digits than its factorization.

1205198797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2548043.

The product of its (nonzero) digits is 317520, while the sum is 49.

The square root of 1205198797 is about 34715.9732255917. The cubic root of 1205198797 is about 1064.1909545366.

It can be divided in two parts, 1205 and 198797, that added together give a palindrome (200002).

The spelling of 1205198797 in words is "one billion, two hundred five million, one hundred ninety-eight thousand, seven hundred ninety-seven".