12443157 has 12 divisors (see below), whose sum is σ = 18919680. Its totient is φ = 7858728.

The previous prime is 12443153. The next prime is 12443191. The reversal of 12443157 is 75134421.

12443157 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12443157 - 2² = 12443153 is a prime.

It is a super-2 number, since 2×12443157² = 309664312253298, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12443157.

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 36213 + ... + 36554.

It is an arithmetic number, because the mean of its divisors is an integer number (1576640).

Almost surely, 2^12443157 is an apocalyptic number.

It is an amenable number.

12443157 is a deficient number, since it is larger than the sum of its proper divisors (6476523).

12443157 is a wasteful number, since it uses less digits than its factorization.

12443157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72792 (or 72789 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 12443157 is about 3527.4859319351. The cubic root of 12443157 is about 231.7271179707.

Adding to 12443157 its reverse (75134421), we get a palindrome (87577578).

The spelling of 12443157 in words is "twelve million, four hundred forty-three thousand, one hundred fifty-seven".