12131235 has 32 divisors (see below), whose sum is σ = 22510080. Its totient is φ = 6187104.

The previous prime is 12131219. The next prime is 12131257. The reversal of 12131235 is 53213121.

It is not a de Polignac number, because 12131235 - 2⁴ = 12131219 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1152 + ... + 5058.

It is an arithmetic number, because the mean of its divisors is an integer number (703440).

Almost surely, 2^12131235 is an apocalyptic number.

12131235 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12131235 is a deficient number, since it is larger than the sum of its proper divisors (10378845).

12131235 is a wasteful number, since it uses less digits than its factorization.

12131235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3944 (or 3938 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 12131235 is about 3482.9922480534. The cubic root of 12131235 is about 229.7744165017.

Adding to 12131235 its reverse (53213121), we get a palindrome (65344356).

The spelling of 12131235 in words is "twelve million, one hundred thirty-one thousand, two hundred thirty-five".