1226403 has 12 divisors (see below), whose sum is σ = 1813240. Its totient is φ = 798336.

The previous prime is 1226387. The next prime is 1226417. The reversal of 1226403 is 3046221.

It is a happy number.

1226403 is a `hidden beast` number, since 1 + 22 + 640 + 3 = 666.

It is not a de Polignac number, because 1226403 - 2⁴ = 1226387 is a prime.

It is a Duffinian number.

1226403 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1226483) 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 11 ways as a sum of consecutive naturals, for example, 1198 + ... + 1971.

2^1226403 is an apocalyptic number.

1226403 is a deficient number, since it is larger than the sum of its proper divisors (586837).

1226403 is a wasteful number, since it uses less digits than its factorization.

1226403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3218 (or 3215 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1226403 is about 1107.4308104798. The cubic root of 1226403 is about 107.0395812454.

The spelling of 1226403 in words is "one million, two hundred twenty-six thousand, four hundred three".