12776505 has 24 divisors (see below), whose sum is σ = 23781312. Its totient is φ = 5840352.

The previous prime is 12776473. The next prime is 12776513. The reversal of 12776505 is 50567721.

12776505 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 12776505 - 2⁵ = 12776473 is a prime.

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, 7957 + ... + 9426.

It is an arithmetic number, because the mean of its divisors is an integer number (990888).

Almost surely, 2^12776505 is an apocalyptic number.

12776505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12776505 is a deficient number, since it is larger than the sum of its proper divisors (11004807).

12776505 is a wasteful number, since it uses less digits than its factorization.

12776505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17405 (or 17398 counting only the distinct ones).

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

The square root of 12776505 is about 3574.4237297780. The cubic root of 12776505 is about 233.7782068204.

The spelling of 12776505 in words is "twelve million, seven hundred seventy-six thousand, five hundred five".