1156055 has 16 divisors (see below), whose sum is σ = 1499520. Its totient is φ = 852768.

The previous prime is 1156039. The next prime is 1156073. The reversal of 1156055 is 5506511.

It is a cyclic number.

It is not a de Polignac number, because 1156055 - 2⁴ = 1156039 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1156055.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3944 + ... + 4226.

It is an arithmetic number, because the mean of its divisors is an integer number (93720).

2^1156055 is an apocalyptic number.

1156055 is a deficient number, since it is larger than the sum of its proper divisors (343465).

1156055 is a wasteful number, since it uses less digits than its factorization.

1156055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 1156055 is about 1075.1999813988. The cubic root of 1156055 is about 104.9525106487.

It can be divided in two parts, 11 and 56055, that multiplied together give a triangular number (616605 = T₁₁₁₀).

The spelling of 1156055 in words is "one million, one hundred fifty-six thousand, fifty-five".