1161205 has 8 divisors (see below), whose sum is σ = 1413504. Its totient is φ = 915600.

The previous prime is 1161203. The next prime is 1161217. The reversal of 1161205 is 5021611.

It is a happy number.

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

It is not a de Polignac number, because 1161205 - 2¹ = 1161203 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 (1161203) 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, 1281 + ... + 1990.

It is an arithmetic number, because the mean of its divisors is an integer number (176688).

2^1161205 is an apocalyptic number.

It is an amenable number.

1161205 is a deficient number, since it is larger than the sum of its proper divisors (252299).

1161205 is an equidigital number, since it uses as much as digits as its factorization.

1161205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3347.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 1161205 is about 1077.5922234315. The cubic root of 1161205 is about 105.1081274648.

Adding to 1161205 its reverse (5021611), we get a palindrome (6182816).

It can be divided in two parts, 11 and 61205, that added together give a palindrome (61216).

The spelling of 1161205 in words is "one million, one hundred sixty-one thousand, two hundred five".