1158397 has 4 divisors (see below), whose sum is σ = 1226556. Its totient is φ = 1090240.

The previous prime is 1158389. The next prime is 1158401. The reversal of 1158397 is 7938511.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 337561 + 820836 = 581^2 + 906^2 .

It is a cyclic number.

It is not a de Polignac number, because 1158397 - 2³ = 1158389 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1158307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34054 + ... + 34087.

It is an arithmetic number, because the mean of its divisors is an integer number (306639).

2^1158397 is an apocalyptic number.

1158397 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1158397 is a deficient number, since it is larger than the sum of its proper divisors (68159).

1158397 is an equidigital number, since it uses as much as digits as its factorization.

1158397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68158.

The product of its digits is 7560, while the sum is 34.

The square root of 1158397 is about 1076.2885300885. The cubic root of 1158397 is about 105.0233357053.

The spelling of 1158397 in words is "one million, one hundred fifty-eight thousand, three hundred ninety-seven".