1149805 has 4 divisors (see below), whose sum is σ = 1379772. Its totient is φ = 919840.

The previous prime is 1149803. The next prime is 1149817. The reversal of 1149805 is 5089411.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 702244 + 447561 = 838^2 + 669^2 .

It is not a de Polignac number, because 1149805 - 2¹ = 1149803 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1149803) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 114976 + ... + 114985.

It is an arithmetic number, because the mean of its divisors is an integer number (344943).

2^1149805 is an apocalyptic number.

It is an amenable number.

1149805 is a deficient number, since it is larger than the sum of its proper divisors (229967).

1149805 is an equidigital number, since it uses as much as digits as its factorization.

1149805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229966.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 1149805 is about 1072.2896064030. The cubic root of 1149805 is about 104.7630332589.

The spelling of 1149805 in words is "one million, one hundred forty-nine thousand, eight hundred five".