1222709 has 4 divisors (see below), whose sum is σ = 1228416. Its totient is φ = 1217004.

The previous prime is 1222693. The next prime is 1222717. The reversal of 1222709 is 9072221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9072221 = 73 ⋅124277.

It is a cyclic number.

It is not a de Polignac number, because 1222709 - 2⁴ = 1222693 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2519 + ... + 2964.

It is an arithmetic number, because the mean of its divisors is an integer number (307104).

2^1222709 is an apocalyptic number.

It is an amenable number.

1222709 is a deficient number, since it is larger than the sum of its proper divisors (5707).

1222709 is an equidigital number, since it uses as much as digits as its factorization.

1222709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5706.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 1222709 is about 1105.7617284026. The cubic root of 1222709 is about 106.9320032653.

The spelling of 1222709 in words is "one million, two hundred twenty-two thousand, seven hundred nine".