12776055 has 16 divisors (see below), whose sum is σ = 20490624. Its totient is φ = 6797600.

The previous prime is 12776053. The next prime is 12776059. The reversal of 12776055 is 55067721.

Added to its reverse (55067721) it gives a triangular number (67843776 = T₁₁₆₄₈).

It is not a de Polignac number, because 12776055 - 2¹ = 12776053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12776053) 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, 8080 + ... + 9530.

It is an arithmetic number, because the mean of its divisors is an integer number (1280664).

Almost surely, 2^12776055 is an apocalyptic number.

12776055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12776055 is a deficient number, since it is larger than the sum of its proper divisors (7714569).

12776055 is a wasteful number, since it uses less digits than its factorization.

12776055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2046.

The product of its (nonzero) digits is 14700, while the sum is 33.

The square root of 12776055 is about 3574.3607820140. The cubic root of 12776055 is about 233.7754621619.

Adding to 12776055 its reverse (55067721), we get a triangular number (67843776 = T₁₁₆₄₈).

The spelling of 12776055 in words is "twelve million, seven hundred seventy-six thousand, fifty-five".