12156447 has 16 divisors (see below), whose sum is σ = 17136000. Its totient is φ = 7644384.

The previous prime is 12156439. The next prime is 12156467. The reversal of 12156447 is 74465121.

It is not a de Polignac number, because 12156447 - 2³ = 12156439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12156467) 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, 23629 + ... + 24137.

It is an arithmetic number, because the mean of its divisors is an integer number (1071000).

Almost surely, 2^12156447 is an apocalyptic number.

12156447 is a deficient number, since it is larger than the sum of its proper divisors (4979553).

12156447 is a wasteful number, since it uses less digits than its factorization.

12156447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950.

The product of its digits is 6720, while the sum is 30.

The square root of 12156447 is about 3486.6096712996. The cubic root of 12156447 is about 229.9334842312.

The spelling of 12156447 in words is "twelve million, one hundred fifty-six thousand, four hundred forty-seven".