12107555 has 4 divisors (see below), whose sum is σ = 14529072. Its totient is φ = 9686040.

The previous prime is 12107551. The next prime is 12107581. The reversal of 12107555 is 55570121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55570121 = 47 ⋅1182343.

It is not a de Polignac number, because 12107555 - 2² = 12107551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12107551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1210751 + ... + 1210760.

It is an arithmetic number, because the mean of its divisors is an integer number (3632268).

Almost surely, 2^12107555 is an apocalyptic number.

12107555 is a deficient number, since it is larger than the sum of its proper divisors (2421517).

12107555 is an equidigital number, since it uses as much as digits as its factorization.

12107555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2421516.

The product of its (nonzero) digits is 1750, while the sum is 26.

The square root of 12107555 is about 3479.5912116224. The cubic root of 12107555 is about 229.6248136427.

Adding to 12107555 its reverse (55570121), we get a palindrome (67677676).

The spelling of 12107555 in words is "twelve million, one hundred seven thousand, five hundred fifty-five".