12181047 has 16 divisors (see below), whose sum is σ = 16868352. Its totient is φ = 7810560.

The previous prime is 12181031. The next prime is 12181051. The reversal of 12181047 is 74018121.

It is not a de Polignac number, because 12181047 - 2⁴ = 12181031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12181087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20823 + ... + 21399.

It is an arithmetic number, because the mean of its divisors is an integer number (1054272).

Almost surely, 2^12181047 is an apocalyptic number.

12181047 is a deficient number, since it is larger than the sum of its proper divisors (4687305).

12181047 is a wasteful number, since it uses less digits than its factorization.

12181047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838.

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 12181047 is about 3490.1356707154. The cubic root of 12181047 is about 230.0884788761.

Adding to 12181047 its reverse (74018121), we get a palindrome (86199168).

The spelling of 12181047 in words is "twelve million, one hundred eighty-one thousand, forty-seven".