12443155 has 8 divisors (see below), whose sum is σ = 15031584. Its totient is φ = 9888000.

The previous prime is 12443153. The next prime is 12443191. The reversal of 12443155 is 55134421.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12443155 - 2¹ = 12443153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12443153) 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, 7486 + ... + 8995.

It is an arithmetic number, because the mean of its divisors is an integer number (1878948).

Almost surely, 2^12443155 is an apocalyptic number.

12443155 is a deficient number, since it is larger than the sum of its proper divisors (2588429).

12443155 is a wasteful number, since it uses less digits than its factorization.

12443155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16637.

The product of its digits is 2400, while the sum is 25.

The square root of 12443155 is about 3527.4856484471. The cubic root of 12443155 is about 231.7271055554.

Adding to 12443155 its reverse (55134421), we get a palindrome (67577576).

The spelling of 12443155 in words is "twelve million, four hundred forty-three thousand, one hundred fifty-five".