1226813 has 6 divisors (see below), whose sum is σ = 1427166. Its totient is φ = 1051512.

The previous prime is 1226807. The next prime is 1226821. The reversal of 1226813 is 3186221.

It can be written as a sum of positive squares in only one way, i.e., 1044484 + 182329 = 1022^2 + 427^2 .

It is not a de Polignac number, because 1226813 - 2⁸ = 1226557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226803) 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 5 ways as a sum of consecutive naturals, for example, 12470 + ... + 12567.

It is an arithmetic number, because the mean of its divisors is an integer number (237861).

2^1226813 is an apocalyptic number.

It is an amenable number.

1226813 is a deficient number, since it is larger than the sum of its proper divisors (200353).

1226813 is an equidigital number, since it uses as much as digits as its factorization.

1226813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25051 (or 25044 counting only the distinct ones).

The product of its digits is 576, while the sum is 23.

The square root of 1226813 is about 1107.6159081559. The cubic root of 1226813 is about 107.0515080858.

The spelling of 1226813 in words is "one million, two hundred twenty-six thousand, eight hundred thirteen".