12685155 has 16 divisors (see below), whose sum is σ = 23195904. Its totient is φ = 5798880.

The previous prime is 12685097. The next prime is 12685163. The reversal of 12685155 is 55158621.

Added to its reverse (55158621) it gives a triangular number (67843776 = T₁₁₆₄₈).

12685155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12685155 - 2⁹ = 12684643 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60301 + ... + 60510.

It is an arithmetic number, because the mean of its divisors is an integer number (1449744).

Almost surely, 2^12685155 is an apocalyptic number.

12685155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12685155 is a deficient number, since it is larger than the sum of its proper divisors (10510749).

12685155 is a wasteful number, since it uses less digits than its factorization.

12685155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120826.

The product of its digits is 12000, while the sum is 33.

The square root of 12685155 is about 3561.6225235137. The cubic root of 12685155 is about 233.2197145250.

Adding to 12685155 its reverse (55158621), we get a triangular number (67843776 = T₁₁₆₄₈).

The spelling of 12685155 in words is "twelve million, six hundred eighty-five thousand, one hundred fifty-five".