1223705 has 8 divisors (see below), whose sum is σ = 1678272. Its totient is φ = 839088.

The previous prime is 1223693. The next prime is 1223723. The reversal of 1223705 is 5073221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1223705 - 2⁴ = 1223689 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17447 + ... + 17516.

It is an arithmetic number, because the mean of its divisors is an integer number (209784).

2^1223705 is an apocalyptic number.

It is an amenable number.

1223705 is a deficient number, since it is larger than the sum of its proper divisors (454567).

1223705 is an equidigital number, since it uses as much as digits as its factorization.

1223705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34975.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 1223705 is about 1106.2120049972. The cubic root of 1223705 is about 106.9610304417.

Adding to 1223705 its reverse (5073221), we get a palindrome (6296926).

The spelling of 1223705 in words is "one million, two hundred twenty-three thousand, seven hundred five".