1156255 has 16 divisors (see below), whose sum is σ = 1499904. Its totient is φ = 852480.

The previous prime is 1156249. The next prime is 1156261. The reversal of 1156255 is 5526511.

It is an interprime number because it is at equal distance from previous prime (1156249) and next prime (1156261).

It is not a de Polignac number, because 1156255 - 2¹¹ = 1154207 is a prime.

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 5074 + ... + 5296.

It is an arithmetic number, because the mean of its divisors is an integer number (93744).

2^1156255 is an apocalyptic number.

1156255 is a deficient number, since it is larger than the sum of its proper divisors (343649).

1156255 is a wasteful number, since it uses less digits than its factorization.

1156255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306.

The product of its digits is 1500, while the sum is 25.

The square root of 1156255 is about 1075.2929833306. The cubic root of 1156255 is about 104.9585626364.

The spelling of 1156255 in words is "one million, one hundred fifty-six thousand, two hundred fifty-five".