12378055 has 16 divisors (see below), whose sum is σ = 15197184. Its totient is φ = 9676800.

The previous prime is 12378053. The next prime is 12378077. The reversal of 12378055 is 55087321.

It is not a de Polignac number, because 12378055 - 2¹ = 12378053 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12378053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64039 + ... + 64231.

It is an arithmetic number, because the mean of its divisors is an integer number (949824).

Almost surely, 2^12378055 is an apocalyptic number.

12378055 is a deficient number, since it is larger than the sum of its proper divisors (2819129).

12378055 is a wasteful number, since it uses less digits than its factorization.

12378055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 12378055 is about 3518.2460118644. The cubic root of 12378055 is about 231.3222827363.

The spelling of 12378055 in words is "twelve million, three hundred seventy-eight thousand, fifty-five".