12438155 has 8 divisors (see below), whose sum is σ = 15115200. Its totient is φ = 9824256.

The previous prime is 12438149. The next prime is 12438157. The reversal of 12438155 is 55183421.

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

It is a cyclic number.

It is not a de Polignac number, because 12438155 - 2⁶ = 12438091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12438157) 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, 15350 + ... + 16139.

It is an arithmetic number, because the mean of its divisors is an integer number (1889400).

Almost surely, 2^12438155 is an apocalyptic number.

12438155 is a deficient number, since it is larger than the sum of its proper divisors (2677045).

12438155 is an equidigital number, since it uses as much as digits as its factorization.

12438155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31573.

The product of its digits is 4800, while the sum is 29.

The square root of 12438155 is about 3526.7768571317. The cubic root of 12438155 is about 231.6960633009.

The spelling of 12438155 in words is "twelve million, four hundred thirty-eight thousand, one hundred fifty-five".