12810155 has 4 divisors (see below), whose sum is σ = 15372192. Its totient is φ = 10248120.

The previous prime is 12810143. The next prime is 12810169. The reversal of 12810155 is 55101821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55101821 = 53 ⋅1039657.

It is not a de Polignac number, because 12810155 - 2¹⁰ = 12809131 is a prime.

It is a super-2 number, since 2×12810155² = 328200142248050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12810155.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1281011 + ... + 1281020.

It is an arithmetic number, because the mean of its divisors is an integer number (3843048).

Almost surely, 2^12810155 is an apocalyptic number.

12810155 is a deficient number, since it is larger than the sum of its proper divisors (2562037).

12810155 is an equidigital number, since it uses as much as digits as its factorization.

12810155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2562036.

The product of its (nonzero) digits is 400, while the sum is 23.

The square root of 12810155 is about 3579.1276870210. The cubic root of 12810155 is about 233.9832639551.

Adding to 12810155 its reverse (55101821), we get a palindrome (67911976).

The spelling of 12810155 in words is "twelve million, eight hundred ten thousand, one hundred fifty-five".