12131000 has 64 divisors (see below), whose sum is σ = 32460480. Its totient is φ = 4156800.

The previous prime is 12130999. The next prime is 12131017. The reversal of 12131000 is 13121.

12131000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12131000² = 294322322000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6134 + ... + 7866.

It is an arithmetic number, because the mean of its divisors is an integer number (507195).

Almost surely, 2^12131000 is an apocalyptic number.

12131000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12131000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16230240).

12131000 is an abundant number, since it is smaller than the sum of its proper divisors (20329480).

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

12131000 is a wasteful number, since it uses less digits than its factorization.

12131000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761 (or 1747 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 12131000 is about 3482.9585125293. The cubic root of 12131000 is about 229.7729328018.

Adding to 12131000 its reverse (13121), we get a palindrome (12144121).

The spelling of 12131000 in words is "twelve million, one hundred thirty-one thousand".