12520155 has 16 divisors (see below), whose sum is σ = 20148480. Its totient is φ = 6638688.

The previous prime is 12520127. The next prime is 12520159. The reversal of 12520155 is 55102521.

12520155 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12520155 - 2⁶ = 12520091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12520159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 354 + ... + 5016.

It is an arithmetic number, because the mean of its divisors is an integer number (1259280).

Almost surely, 2^12520155 is an apocalyptic number.

12520155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12520155 is a deficient number, since it is larger than the sum of its proper divisors (7628325).

12520155 is a wasteful number, since it uses less digits than its factorization.

12520155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4850.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 12520155 is about 3538.3831053180. The cubic root of 12520155 is about 232.2041096637.

Adding to 12520155 its reverse (55102521), we get a palindrome (67622676).

The spelling of 12520155 in words is "twelve million, five hundred twenty thousand, one hundred fifty-five".