12447331 has 8 divisors (see below), whose sum is σ = 13544384. Its totient is φ = 11370240.

The previous prime is 12447329. The next prime is 12447343. The reversal of 12447331 is 13374421.

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 12447331 - 2¹ = 12447329 is a prime.

It is a super-2 number, since 2×12447331² = 309872098047122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12447296 and 12447305.

It is not an unprimeable number, because it can be changed into a prime (12447361) 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, 3675 + ... + 6196.

It is an arithmetic number, because the mean of its divisors is an integer number (1693048).

Almost surely, 2^12447331 is an apocalyptic number.

12447331 is a deficient number, since it is larger than the sum of its proper divisors (1097053).

12447331 is an equidigital number, since it uses as much as digits as its factorization.

12447331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9981.

The product of its digits is 2016, while the sum is 25.

The square root of 12447331 is about 3528.0775218240. The cubic root of 12447331 is about 231.7530256740.

The spelling of 12447331 in words is "twelve million, four hundred forty-seven thousand, three hundred thirty-one".