12131647 has 8 divisors (see below), whose sum is σ = 13484880. Its totient is φ = 10820160.

The previous prime is 12131641. The next prime is 12131653. The reversal of 12131647 is 74613121.

It is an interprime number because it is at equal distance from previous prime (12131641) and next prime (12131653).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12131647 - 2²³ = 3743039 is a prime.

It is a Duffinian number.

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, 9822 + ... + 10987.

It is an arithmetic number, because the mean of its divisors is an integer number (1685610).

Almost surely, 2^12131647 is an apocalyptic number.

12131647 is a deficient number, since it is larger than the sum of its proper divisors (1353233).

12131647 is a wasteful number, since it uses less digits than its factorization.

12131647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20873.

The product of its digits is 1008, while the sum is 25.

The square root of 12131647 is about 3483.0513920986. The cubic root of 12131647 is about 229.7770176655. Note that the first 3 decimals are identical.

Adding to 12131647 its reverse (74613121), we get a palindrome (86744768).

The spelling of 12131647 in words is "twelve million, one hundred thirty-one thousand, six hundred forty-seven".