1224257 has 2 divisors, whose sum is σ = 1224258. Its totient is φ = 1224256.

The previous prime is 1224239. The next prime is 1224259. The reversal of 1224257 is 7524221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1168561 + 55696 = 1081^2 + 236^2 .

It is an emirp because it is prime and its reverse (7524221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1224257 - 2⁶ = 1224193 is a prime.

Together with 1224259, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1224259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612128 + 612129.

It is an arithmetic number, because the mean of its divisors is an integer number (612129).

2^1224257 is an apocalyptic number.

It is an amenable number.

1224257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1224257 is an equidigital number, since it uses as much as digits as its factorization.

1224257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1120, while the sum is 23.

The square root of 1224257 is about 1106.4614769616. The cubic root of 1224257 is about 106.9771110094.

Adding to 1224257 its reverse (7524221), we get a palindrome (8748478).

The spelling of 1224257 in words is "one million, two hundred twenty-four thousand, two hundred fifty-seven".