12776403 has 4 divisors (see below), whose sum is σ = 17035208. Its totient is φ = 8517600.

The previous prime is 12776383. The next prime is 12776411. The reversal of 12776403 is 30467721.

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

It is not a de Polignac number, because 12776403 - 2⁸ = 12776147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12776453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2129398 + ... + 2129403.

It is an arithmetic number, because the mean of its divisors is an integer number (4258802).

Almost surely, 2^12776403 is an apocalyptic number.

12776403 is a deficient number, since it is larger than the sum of its proper divisors (4258805).

12776403 is an equidigital number, since it uses as much as digits as its factorization.

12776403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4258804.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 12776403 is about 3574.4094617153. The cubic root of 12776403 is about 233.7775847035. Note that the first 3 decimals are identical.

The spelling of 12776403 in words is "twelve million, seven hundred seventy-six thousand, four hundred three".