12131285 has 24 divisors (see below), whose sum is σ = 16061976. Its totient is φ = 8760320.

The previous prime is 12131269. The next prime is 12131293. The reversal of 12131285 is 58213121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 421201 + 11710084 = 649^2 + 3422^2 .

It is not a de Polignac number, because 12131285 - 2⁴ = 12131269 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 12131285.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 205586 + ... + 205644.

It is an arithmetic number, because the mean of its divisors is an integer number (669249).

Almost surely, 2^12131285 is an apocalyptic number.

It is an amenable number.

12131285 is a deficient number, since it is larger than the sum of its proper divisors (3930691).

12131285 is an equidigital number, since it uses as much as digits as its factorization.

12131285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181 (or 122 counting only the distinct ones).

The product of its digits is 480, while the sum is 23.

The square root of 12131285 is about 3482.9994257823. Note that the first 3 decimals coincide. The cubic root of 12131285 is about 229.7747321800.

The spelling of 12131285 in words is "twelve million, one hundred thirty-one thousand, two hundred eighty-five".