1158671 has 4 divisors (see below), whose sum is σ = 1209072. Its totient is φ = 1108272.

The previous prime is 1158653. The next prime is 1158673. The reversal of 1158671 is 1768511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1768511 = 1091 ⋅1621.

It is a cyclic number.

It is not a de Polignac number, because 1158671 - 2⁶ = 1158607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1158673) 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, 25166 + ... + 25211.

It is an arithmetic number, because the mean of its divisors is an integer number (302268).

2^1158671 is an apocalyptic number.

1158671 is a deficient number, since it is larger than the sum of its proper divisors (50401).

1158671 is an equidigital number, since it uses as much as digits as its factorization.

1158671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50400.

The product of its digits is 1680, while the sum is 29.

The square root of 1158671 is about 1076.4158118497. The cubic root of 1158671 is about 105.0316155741.

The spelling of 1158671 in words is "one million, one hundred fifty-eight thousand, six hundred seventy-one".