1306217 has 4 divisors (see below), whose sum is σ = 1424976. Its totient is φ = 1187460.

The previous prime is 1306213. The next prime is 1306223. The reversal of 1306217 is 7126031.

It is a happy number.

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: 7126031 = 11 ⋅647821.

It is a cyclic number.

It is not a de Polignac number, because 1306217 - 2² = 1306213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1306213) 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, 59363 + ... + 59384.

It is an arithmetic number, because the mean of its divisors is an integer number (356244).

2^1306217 is an apocalyptic number.

It is an amenable number.

1306217 is a deficient number, since it is larger than the sum of its proper divisors (118759).

1306217 is a wasteful number, since it uses less digits than its factorization.

1306217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118758.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 1306217 is about 1142.8985081800. The cubic root of 1306217 is about 109.3129909192.

The spelling of 1306217 in words is "one million, three hundred six thousand, two hundred seventeen".