12774155 has 4 divisors (see below), whose sum is σ = 15328992. Its totient is φ = 10219320.

The previous prime is 12774133. The next prime is 12774161. The reversal of 12774155 is 55147721.

12774155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12774155 - 2¹² = 12770059 is a prime.

It is a Duffinian number.

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, 1277411 + ... + 1277420.

It is an arithmetic number, because the mean of its divisors is an integer number (3832248).

Almost surely, 2^12774155 is an apocalyptic number.

12774155 is a deficient number, since it is larger than the sum of its proper divisors (2554837).

12774155 is an equidigital number, since it uses as much as digits as its factorization.

12774155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2554836.

The product of its digits is 9800, while the sum is 32.

The square root of 12774155 is about 3574.0949903437. The cubic root of 12774155 is about 233.7638728934.

The spelling of 12774155 in words is "twelve million, seven hundred seventy-four thousand, one hundred fifty-five".