1140689 has 4 divisors (see below), whose sum is σ = 1244400. Its totient is φ = 1036980.

The previous prime is 1140679. The next prime is 1140691. The reversal of 1140689 is 9860411.

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 a cyclic number.

It is not a de Polignac number, because 1140689 - 2¹² = 1136593 is a prime.

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 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, 51839 + ... + 51860.

It is an arithmetic number, because the mean of its divisors is an integer number (311100).

2^1140689 is an apocalyptic number.

It is an amenable number.

1140689 is a deficient number, since it is larger than the sum of its proper divisors (103711).

1140689 is a wasteful number, since it uses less digits than its factorization.

1140689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103710.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 1140689 is about 1068.0304302781. The cubic root of 1140689 is about 104.4854340480.

The spelling of 1140689 in words is "one million, one hundred forty thousand, six hundred eighty-nine".