1161055 has 16 divisors (see below), whose sum is σ = 1627200. Its totient is φ = 794976.

The previous prime is 1161047. The next prime is 1161059. The reversal of 1161055 is 5501611.

It is not a de Polignac number, because 1161055 - 2³ = 1161047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161059) 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, 1377 + ... + 2053.

It is an arithmetic number, because the mean of its divisors is an integer number (101700).

2^1161055 is an apocalyptic number.

1161055 is a deficient number, since it is larger than the sum of its proper divisors (466145).

1161055 is an frugal number, since it uses more digits than its factorization.

1161055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703 (or 689 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 1161055 is about 1077.5226215723. The cubic root of 1161055 is about 105.1036014486.

Adding to 1161055 its reverse (5501611), we get a palindrome (6662666).

The spelling of 1161055 in words is "one million, one hundred sixty-one thousand, fifty-five".