12040055 has 4 divisors (see below), whose sum is σ = 14448072. Its totient is φ = 9632040.

The previous prime is 12040027. The next prime is 12040057. The reversal of 12040055 is 55004021.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12040055 - 2⁶ = 12039991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12040057) 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, 1204001 + ... + 1204010.

It is an arithmetic number, because the mean of its divisors is an integer number (3612018).

Almost surely, 2^12040055 is an apocalyptic number.

12040055 is a deficient number, since it is larger than the sum of its proper divisors (2408017).

12040055 is an equidigital number, since it uses as much as digits as its factorization.

12040055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2408016.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 12040055 is about 3469.8782399387. The cubic root of 12040055 is about 229.1972963284.

Adding to 12040055 its reverse (55004021), we get a palindrome (67044076).

The spelling of 12040055 in words is "twelve million, forty thousand, fifty-five".