1140609 has 4 divisors (see below), whose sum is σ = 1520816. Its totient is φ = 760404.

The previous prime is 1140577. The next prime is 1140611. The reversal of 1140609 is 9060411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1140609 - 2⁵ = 1140577 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1140619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190099 + ... + 190104.

It is an arithmetic number, because the mean of its divisors is an integer number (380204).

2^1140609 is an apocalyptic number.

It is an amenable number.

1140609 is a deficient number, since it is larger than the sum of its proper divisors (380207).

1140609 is an equidigital number, since it uses as much as digits as its factorization.

1140609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380206.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 1140609 is about 1067.9929775050. The cubic root of 1140609 is about 104.4829913635.

The spelling of 1140609 in words is "one million, one hundred forty thousand, six hundred nine".