12131646 has 16 divisors (see below), whose sum is σ = 24374784. Its totient is φ = 4025304.

The previous prime is 12131641. The next prime is 12131653. The reversal of 12131646 is 64613121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3196 + ... + 5871.

It is an arithmetic number, because the mean of its divisors is an integer number (1523424).

Almost surely, 2^12131646 is an apocalyptic number.

12131646 is an abundant number, since it is smaller than the sum of its proper divisors (12243138).

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

12131646 is a wasteful number, since it uses less digits than its factorization.

12131646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9295.

The product of its digits is 864, while the sum is 24.

The square root of 12131646 is about 3483.0512485463. The cubic root of 12131646 is about 229.7770113521. Note that the first 3 decimals are identical.

Adding to 12131646 its reverse (64613121), we get a palindrome (76744767).

The spelling of 12131646 in words is "twelve million, one hundred thirty-one thousand, six hundred forty-six".