1153855 has 4 divisors (see below), whose sum is σ = 1384632. Its totient is φ = 923080.

The previous prime is 1153853. The next prime is 1153871. The reversal of 1153855 is 5583511.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1153855 - 2¹ = 1153853 is a prime.

It is a super-2 number, since 2×1153855² = 2662762722050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1153853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115381 + ... + 115390.

It is an arithmetic number, because the mean of its divisors is an integer number (346158).

2^1153855 is an apocalyptic number.

1153855 is a deficient number, since it is larger than the sum of its proper divisors (230777).

1153855 is an equidigital number, since it uses as much as digits as its factorization.

1153855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230776.

The product of its digits is 3000, while the sum is 28.

The square root of 1153855 is about 1074.1764287118. The cubic root of 1153855 is about 104.8858926692.

The spelling of 1153855 in words is "one million, one hundred fifty-three thousand, eight hundred fifty-five".