1145809 has 8 divisors (see below), whose sum is σ = 1317888. Its totient is φ = 975840.

The previous prime is 1145803. The next prime is 1145831. The reversal of 1145809 is 9085411.

It is a happy number.

1145809 is nontrivially palindromic in base 2.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1145809 - 2³ = 1145801 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 (1145801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 909 + ... + 1765.

It is an arithmetic number, because the mean of its divisors is an integer number (164736).

2^1145809 is an apocalyptic number.

It is an amenable number.

1145809 is a deficient number, since it is larger than the sum of its proper divisors (172079).

1145809 is an equidigital number, since it uses as much as digits as its factorization.

1145809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055.

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

The square root of 1145809 is about 1070.4246820772. The cubic root of 1145809 is about 104.6415288913.

The spelling of 1145809 in words is "one million, one hundred forty-five thousand, eight hundred nine".