1155105 has 48 divisors (see below), whose sum is σ = 2421120. Its totient is φ = 497664.

The previous prime is 1155101. The next prime is 1155107. The reversal of 1155105 is 5015511.

It is not a de Polignac number, because 1155105 - 2² = 1155101 is a prime.

It is a super-3 number, since 3×1155105³ = 4623657393233347875, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5889 + ... + 6081.

It is an arithmetic number, because the mean of its divisors is an integer number (50440).

2^1155105 is an apocalyptic number.

1155105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1155105 is an abundant number, since it is smaller than the sum of its proper divisors (1266015).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1155105 is a wasteful number, since it uses less digits than its factorization.

1155105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230 (or 227 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 18.

The square root of 1155105 is about 1074.7581123211. The cubic root of 1155105 is about 104.9237541712.

The spelling of 1155105 in words is "one million, one hundred fifty-five thousand, one hundred five".