1158131 has 4 divisors (see below), whose sum is σ = 1247232. Its totient is φ = 1069032.

The previous prime is 1158121. The next prime is 1158133. The reversal of 1158131 is 1318511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1318511 = 241 ⋅5471.

It is a cyclic number.

It is not a de Polignac number, because 1158131 - 2¹⁸ = 895987 is a prime.

It is a super-2 number, since 2×1158131² = 2682534826322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1158133) 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, 44531 + ... + 44556.

It is an arithmetic number, because the mean of its divisors is an integer number (311808).

2^1158131 is an apocalyptic number.

1158131 is a deficient number, since it is larger than the sum of its proper divisors (89101).

1158131 is an equidigital number, since it uses as much as digits as its factorization.

1158131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89100.

The product of its digits is 120, while the sum is 20.

The square root of 1158131 is about 1076.1649501819. The cubic root of 1158131 is about 105.0152963354.

The spelling of 1158131 in words is "one million, one hundred fifty-eight thousand, one hundred thirty-one".