12766403 has 8 divisors (see below), whose sum is σ = 14346528. Its totient is φ = 11271744.

The previous prime is 12766393. The next prime is 12766441. The reversal of 12766403 is 30466721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12766403 - 2¹⁸ = 12504259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12766463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21050 + ... + 21647.

It is an arithmetic number, because the mean of its divisors is an integer number (1793316).

Almost surely, 2^12766403 is an apocalyptic number.

12766403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12766403 is a deficient number, since it is larger than the sum of its proper divisors (1580125).

12766403 is a wasteful number, since it uses less digits than its factorization.

12766403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42733.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 12766403 is about 3573.0103554286. The cubic root of 12766403 is about 233.7165767648.

The spelling of 12766403 in words is "twelve million, seven hundred sixty-six thousand, four hundred three".