1228247 has 2 divisors, whose sum is σ = 1228248. Its totient is φ = 1228246.

The previous prime is 1228243. The next prime is 1228273. The reversal of 1228247 is 7428221.

It is an a-pointer prime, because the next prime (1228273) can be obtained adding 1228247 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1228247 - 2² = 1228243 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1228243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614123 + 614124.

It is an arithmetic number, because the mean of its divisors is an integer number (614124).

2^1228247 is an apocalyptic number.

1228247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228247 is an equidigital number, since it uses as much as digits as its factorization.

1228247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1792, while the sum is 26.

The square root of 1228247 is about 1108.2630554160. The cubic root of 1228247 is about 107.0932020492.

Subtracting from 1228247 its sum of digits (26), we obtain a palindrome (1228221).

The spelling of 1228247 in words is "one million, two hundred twenty-eight thousand, two hundred forty-seven".