1225717 has 4 divisors (see below), whose sum is σ = 1297836. Its totient is φ = 1153600.

The previous prime is 1225703. The next prime is 1225723. The reversal of 1225717 is 7175221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7175221 = 1997 ⋅3593.

It can be written as a sum of positive squares in 2 ways, for example, as 576081 + 649636 = 759^2 + 806^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225717 - 2⁷ = 1225589 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1225691 and 1225700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36034 + ... + 36067.

It is an arithmetic number, because the mean of its divisors is an integer number (324459).

2^1225717 is an apocalyptic number.

1225717 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1225717 is a deficient number, since it is larger than the sum of its proper divisors (72119).

1225717 is an equidigital number, since it uses as much as digits as its factorization.

1225717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72118.

The product of its digits is 980, while the sum is 25.

The square root of 1225717 is about 1107.1210412597. The cubic root of 1225717 is about 107.0196196591.

The spelling of 1225717 in words is "one million, two hundred twenty-five thousand, seven hundred seventeen".