1155285 has 12 divisors (see below), whose sum is σ = 2002572. Its totient is φ = 616128.

The previous prime is 1155263. The next prime is 1155293. The reversal of 1155285 is 5825511.

It can be written as a sum of positive squares in 2 ways, for example, as 715716 + 439569 = 846^2 + 663^2 .

It is not a de Polignac number, because 1155285 - 2¹¹ = 1153237 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12792 + ... + 12881.

It is an arithmetic number, because the mean of its divisors is an integer number (166881).

2^1155285 is an apocalyptic number.

1155285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1155285 is a deficient number, since it is larger than the sum of its proper divisors (847287).

1155285 is a wasteful number, since it uses less digits than its factorization.

1155285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25684 (or 25681 counting only the distinct ones).

The product of its digits is 2000, while the sum is 27.

The square root of 1155285 is about 1074.8418488317. The cubic root of 1155285 is about 104.9292039773.

The spelling of 1155285 in words is "one million, one hundred fifty-five thousand, two hundred eighty-five".