12447081 has 32 divisors (see below), whose sum is σ = 19261440. Its totient is φ = 7938000.

The previous prime is 12447079. The next prime is 12447107. The reversal of 12447081 is 18074421.

It is not a de Polignac number, because 12447081 - 2¹ = 12447079 is a prime.

It is a super-2 number, since 2×12447081² = 309859650841122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12447031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82356 + ... + 82506.

It is an arithmetic number, because the mean of its divisors is an integer number (601920).

Almost surely, 2^12447081 is an apocalyptic number.

It is an amenable number.

12447081 is a deficient number, since it is larger than the sum of its proper divisors (6814359).

12447081 is a wasteful number, since it uses less digits than its factorization.

12447081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 12447081 is about 3528.0420915856. The cubic root of 12447081 is about 231.7514741059.

The spelling of 12447081 in words is "twelve million, four hundred forty-seven thousand, eighty-one".