12147311 has 6 divisors (see below), whose sum is σ = 13352136. Its totient is φ = 11042900.

The previous prime is 12147293. The next prime is 12147323. The reversal of 12147311 is 11374121.

It is a happy number.

It is not a de Polignac number, because 12147311 - 2¹⁰ = 12146287 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 (12147341) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50075 + ... + 50316.

It is an arithmetic number, because the mean of its divisors is an integer number (2225356).

Almost surely, 2^12147311 is an apocalyptic number.

12147311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12147311 is a deficient number, since it is larger than the sum of its proper divisors (1204825).

12147311 is a wasteful number, since it uses less digits than its factorization.

12147311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100413 (or 100402 counting only the distinct ones).

The product of its digits is 168, while the sum is 20.

The square root of 12147311 is about 3485.2992697902. The cubic root of 12147311 is about 229.8758687461.

The spelling of 12147311 in words is "twelve million, one hundred forty-seven thousand, three hundred eleven".