1161500205 has 16 divisors (see below), whose sum is σ = 1861548480. Its totient is φ = 618417408.

The previous prime is 1161500201. The next prime is 1161500209. The reversal of 1161500205 is 5020051611.

It is an interprime number because it is at equal distance from previous prime (1161500201) and next prime (1161500209).

It is not a de Polignac number, because 1161500205 - 2² = 1161500201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161500201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56395 + ... + 74184.

It is an arithmetic number, because the mean of its divisors is an integer number (116346780).

Almost surely, 2^1161500205 is an apocalyptic number.

1161500205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1161500205 is a deficient number, since it is larger than the sum of its proper divisors (700048275).

1161500205 is a wasteful number, since it uses less digits than its factorization.

1161500205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131180.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 1161500205 is about 34080.7893834635. The cubic root of 1161500205 is about 1051.1703367738.

Adding to 1161500205 its reverse (5020051611), we get a palindrome (6181551816).

The spelling of 1161500205 in words is "one billion, one hundred sixty-one million, five hundred thousand, two hundred five".