12131574 has 64 divisors (see below), whose sum is σ = 31643136. Its totient is φ = 3009024.

The previous prime is 12131573. The next prime is 12131621. The reversal of 12131574 is 47513121.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131573) 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, 8629 + ... + 9935.

It is an arithmetic number, because the mean of its divisors is an integer number (494424).

Almost surely, 2^12131574 is an apocalyptic number.

12131574 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 12131574, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15821568).

12131574 is an abundant number, since it is smaller than the sum of its proper divisors (19511562).

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

12131574 is a wasteful number, since it uses less digits than its factorization.

12131574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1349.

The product of its digits is 840, while the sum is 24.

The square root of 12131574 is about 3483.0409127657. The cubic root of 12131574 is about 229.7765567840.

Adding to 12131574 its reverse (47513121), we get a palindrome (59644695).

The spelling of 12131574 in words is "twelve million, one hundred thirty-one thousand, five hundred seventy-four".