12520055 has 4 divisors (see below), whose sum is σ = 15024072. Its totient is φ = 10016040.

The previous prime is 12520051. The next prime is 12520091. The reversal of 12520055 is 55002521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55002521 = 7 ⋅7857503.

It is not a de Polignac number, because 12520055 - 2² = 12520051 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 (12520051) 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, 1252001 + ... + 1252010.

It is an arithmetic number, because the mean of its divisors is an integer number (3756018).

Almost surely, 2^12520055 is an apocalyptic number.

12520055 is a deficient number, since it is larger than the sum of its proper divisors (2504017).

12520055 is an equidigital number, since it uses as much as digits as its factorization.

12520055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2504016.

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 12520055 is about 3538.3689745418. The cubic root of 12520055 is about 232.2034914479.

Adding to 12520055 its reverse (55002521), we get a palindrome (67522576).

The spelling of 12520055 in words is "twelve million, five hundred twenty thousand, fifty-five".