12158077 has 16 divisors (see below), whose sum is σ = 13314672. Its totient is φ = 11059200.

The previous prime is 12158063. The next prime is 12158087. The reversal of 12158077 is 77085121.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2292196 + 9865881 = 1514^2 + 3141^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12158077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12158057) 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 15 ways as a sum of consecutive naturals, for example, 120327 + ... + 120427.

It is an arithmetic number, because the mean of its divisors is an integer number (832167).

Almost surely, 2^12158077 is an apocalyptic number.

12158077 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12158077 is a deficient number, since it is larger than the sum of its proper divisors (1156595).

12158077 is a wasteful number, since it uses less digits than its factorization.

12158077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288.

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 12158077 is about 3486.8434148955. The cubic root of 12158077 is about 229.9437606667.

The spelling of 12158077 in words is "twelve million, one hundred fifty-eight thousand, seventy-seven".