12019158 has 32 divisors (see below), whose sum is σ = 27084000. Its totient is φ = 3950208.

The previous prime is 12019151. The next prime is 12019159. The reversal of 12019158 is 85191021.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12019151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2418 + ... + 5466.

It is an arithmetic number, because the mean of its divisors is an integer number (846375).

Almost surely, 2^12019158 is an apocalyptic number.

12019158 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12019158, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13542000).

12019158 is an abundant number, since it is smaller than the sum of its proper divisors (15064842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12019158 is a wasteful number, since it uses less digits than its factorization.

12019158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3133 (or 3127 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 12019158 is about 3466.8657314641. The cubic root of 12019158 is about 229.0646194837.

The spelling of 12019158 in words is "twelve million, nineteen thousand, one hundred fifty-eight".