12081158 has 4 divisors (see below), whose sum is σ = 18121740. Its totient is φ = 6040578.

The previous prime is 12081149. The next prime is 12081161. The reversal of 12081158 is 85118021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85118021 = 157 ⋅542153.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3020288 + ... + 3020291.

It is an arithmetic number, because the mean of its divisors is an integer number (4530435).

Almost surely, 2^12081158 is an apocalyptic number.

12081158 is a deficient number, since it is larger than the sum of its proper divisors (6040582).

12081158 is an equidigital number, since it uses as much as digits as its factorization.

12081158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6040581.

The product of its (nonzero) digits is 640, while the sum is 26.

The square root of 12081158 is about 3475.7960239347. The cubic root of 12081158 is about 229.4578155275.

Adding to 12081158 its reverse (85118021), we get a palindrome (97199179).

The spelling of 12081158 in words is "twelve million, eighty-one thousand, one hundred fifty-eight".