12131154 has 64 divisors (see below), whose sum is σ = 31334400. Its totient is φ = 3407184.

The previous prime is 12131113. The next prime is 12131159. The reversal of 12131154 is 45113121.

12131154 is digitally balanced in base 2, because in such base 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 (18).

It is not an unprimeable number, because it can be changed into a prime (12131159) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25087 + ... + 25565.

It is an arithmetic number, because the mean of its divisors is an integer number (489600).

Almost surely, 2^12131154 is an apocalyptic number.

12131154 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12131154, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15667200).

12131154 is an abundant number, since it is smaller than the sum of its proper divisors (19203246).

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

12131154 is a wasteful number, since it uses less digits than its factorization.

12131154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564 (or 558 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 12131154 is about 3482.9806201011. The cubic root of 12131154 is about 229.7739051009.

Adding to 12131154 its reverse (45113121), we get a palindrome (57244275).

The spelling of 12131154 in words is "twelve million, one hundred thirty-one thousand, one hundred fifty-four".