1226623 has 2 divisors, whose sum is σ = 1226624. Its totient is φ = 1226622.

The previous prime is 1226611. The next prime is 1226629. The reversal of 1226623 is 3266221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1226623 - 2⁹ = 1226111 is a prime.

1226623 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1226594 and 1226603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1226629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613311 + 613312.

It is an arithmetic number, because the mean of its divisors is an integer number (613312).

2^1226623 is an apocalyptic number.

1226623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226623 is an equidigital number, since it uses as much as digits as its factorization.

1226623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 22.

The square root of 1226623 is about 1107.5301350302. The cubic root of 1226623 is about 107.0459813439.

It can be divided in two parts, 1226 and 623, that added together give a square (1849 = 43²).

The spelling of 1226623 in words is "one million, two hundred twenty-six thousand, six hundred twenty-three".