1217423 has 2 divisors, whose sum is σ = 1217424. Its totient is φ = 1217422.

The previous prime is 1217417. The next prime is 1217443. The reversal of 1217423 is 3247121.

It is an a-pointer prime, because the next prime (1217443) can be obtained adding 1217423 to its sum of digits (20).

It is a weak prime.

It is an emirp because it is prime and its reverse (3247121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1217423 - 2⁴ = 1217407 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1217395 and 1217404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1217443) 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 as a sum of consecutive naturals, namely, 608711 + 608712.

It is an arithmetic number, because the mean of its divisors is an integer number (608712).

2^1217423 is an apocalyptic number.

1217423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1217423 is an equidigital number, since it uses as much as digits as its factorization.

1217423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 20.

The square root of 1217423 is about 1103.3689319534. The cubic root of 1217423 is about 106.7776849767. Note that the first 3 decimals are identical.

The spelling of 1217423 in words is "one million, two hundred seventeen thousand, four hundred twenty-three".