1236623 has 2 divisors, whose sum is σ = 1236624. Its totient is φ = 1236622.

The previous prime is 1236611. The next prime is 1236629. The reversal of 1236623 is 3266321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1236623 - 2¹² = 1232527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1236629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 618311 + 618312.

It is an arithmetic number, because the mean of its divisors is an integer number (618312).

2^1236623 is an apocalyptic number.

1236623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1236623 is an equidigital number, since it uses as much as digits as its factorization.

1236623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 23.

The square root of 1236623 is about 1112.0355210154. The cubic root of 1236623 is about 107.3360905721.

The spelling of 1236623 in words is "one million, two hundred thirty-six thousand, six hundred twenty-three".