1140389 has 2 divisors, whose sum is σ = 1140390. Its totient is φ = 1140388.

The previous prime is 1140383. The next prime is 1140413. The reversal of 1140389 is 9830411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1119364 + 21025 = 1058^2 + 145^2 .

It is a cyclic number.

It is not a de Polignac number, because 1140389 - 2²⁰ = 91813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1140383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 570194 + 570195.

It is an arithmetic number, because the mean of its divisors is an integer number (570195).

2^1140389 is an apocalyptic number.

It is an amenable number.

1140389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1140389 is an equidigital number, since it uses as much as digits as its factorization.

1140389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 1140389 is about 1067.8899756061. The cubic root of 1140389 is about 104.4762733920.

The spelling of 1140389 in words is "one million, one hundred forty thousand, three hundred eighty-nine".