1158389 has 2 divisors, whose sum is σ = 1158390. Its totient is φ = 1158388.

The previous prime is 1158383. The next prime is 1158401. The reversal of 1158389 is 9838511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1030225 + 128164 = 1015^2 + 358^2 .

It is a cyclic number.

It is not a de Polignac number, because 1158389 - 2⁸ = 1158133 is a prime.

It is a Chen prime.

It is a nialpdrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1158383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 579194 + 579195.

It is an arithmetic number, because the mean of its divisors is an integer number (579195).

2^1158389 is an apocalyptic number.

It is an amenable number.

1158389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1158389 is an equidigital number, since it uses as much as digits as its factorization.

1158389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 35.

The square root of 1158389 is about 1076.2848136065. The cubic root of 1158389 is about 105.0230939377.

The spelling of 1158389 in words is "one million, one hundred fifty-eight thousand, three hundred eighty-nine".