12105156 has 96 divisors (see below), whose sum is σ = 35078400. Its totient is φ = 3236352.

The previous prime is 12105143. The next prime is 12105167. The reversal of 12105156 is 65150121.

12105156 is digitally balanced in base 2, base 4 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

12105156 is strictly pandigital in base 8.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69886 + ... + 70058.

It is an arithmetic number, because the mean of its divisors is an integer number (365400).

Almost surely, 2^12105156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12105156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17539200).

12105156 is an abundant number, since it is smaller than the sum of its proper divisors (22973244).

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

12105156 is a wasteful number, since it uses less digits than its factorization.

12105156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 12105156 is about 3479.2464701426. The cubic root of 12105156 is about 229.6096466302.

Adding to 12105156 its reverse (65150121), we get a palindrome (77255277).

The spelling of 12105156 in words is "twelve million, one hundred five thousand, one hundred fifty-six".