12509055 has 24 divisors (see below), whose sum is σ = 23351328. Its totient is φ = 6158016.

The previous prime is 12509009. The next prime is 12509083. The reversal of 12509055 is 55090521.

It is not a de Polignac number, because 12509055 - 2⁷ = 12508927 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10107 + ... + 11276.

It is an arithmetic number, because the mean of its divisors is an integer number (972972).

Almost surely, 2^12509055 is an apocalyptic number.

12509055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12509055 is a deficient number, since it is larger than the sum of its proper divisors (10842273).

12509055 is a wasteful number, since it uses less digits than its factorization.

12509055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21407 (or 21404 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 27.

The square root of 12509055 is about 3536.8142444861. The cubic root of 12509055 is about 232.1354676036.

Adding to 12509055 its reverse (55090521), we get a palindrome (67599576).

It can be divided in two parts, 1 and 2509055, that added together give a square (2509056 = 1584²).

The spelling of 12509055 in words is "twelve million, five hundred nine thousand, fifty-five".