12131745 has 16 divisors (see below), whose sum is σ = 19936320. Its totient is φ = 6295104.

The previous prime is 12131711. The next prime is 12131759. The reversal of 12131745 is 54713121.

12131745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12131745 - 2⁶ = 12131681 is a prime.

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, 10375 + ... + 11484.

It is an arithmetic number, because the mean of its divisors is an integer number (1246020).

Almost surely, 2^12131745 is an apocalyptic number.

12131745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12131745 is a deficient number, since it is larger than the sum of its proper divisors (7804575).

12131745 is a wasteful number, since it uses less digits than its factorization.

12131745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21904.

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

The square root of 12131745 is about 3483.0654601945. The cubic root of 12131745 is about 229.7776363802. Note that the first 3 decimals are identical.

Adding to 12131745 its reverse (54713121), we get a palindrome (66844866).

The spelling of 12131745 in words is "twelve million, one hundred thirty-one thousand, seven hundred forty-five".