1165555 has 8 divisors (see below), whose sum is σ = 1472400. Its totient is φ = 883296.

The previous prime is 1165531. The next prime is 1165579. The reversal of 1165555 is 5555611.

It is an interprime number because it is at equal distance from previous prime (1165531) and next prime (1165579).

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 1165555 - 2¹¹ = 1163507 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6040 + ... + 6229.

It is an arithmetic number, because the mean of its divisors is an integer number (184050).

2^1165555 is an apocalyptic number.

1165555 is a deficient number, since it is larger than the sum of its proper divisors (306845).

1165555 is a wasteful number, since it uses less digits than its factorization.

1165555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12293.

The product of its digits is 3750, while the sum is 28.

The square root of 1165555 is about 1079.6087254186. The cubic root of 1165555 is about 105.2392127332.

It can be divided in two parts, 116 and 5555, that added together give a triangular number (5671 = T₁₀₆).

The spelling of 1165555 in words is "one million, one hundred sixty-five thousand, five hundred fifty-five".