1228613 has 2 divisors, whose sum is σ = 1228614. Its totient is φ = 1228612.

The previous prime is 1228603. The next prime is 1228631. The reversal of 1228613 is 3168221.

Together with next prime (1228631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1151329 + 77284 = 1073^2 + 278^2 .

It is a cyclic number.

It is not a de Polignac number, because 1228613 - 2¹⁶ = 1163077 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1228603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614306 + 614307.

It is an arithmetic number, because the mean of its divisors is an integer number (614307).

2^1228613 is an apocalyptic number.

It is an amenable number.

1228613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228613 is an equidigital number, since it uses as much as digits as its factorization.

1228613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 23.

The square root of 1228613 is about 1108.4281663689. The cubic root of 1228613 is about 107.1038384058.

The spelling of 1228613 in words is "one million, two hundred twenty-eight thousand, six hundred thirteen".