1217313 has 6 divisors (see below), whose sum is σ = 1758354. Its totient is φ = 811536.

The previous prime is 1217309. The next prime is 1217317. The reversal of 1217313 is 3137121.

It is an interprime number because it is at equal distance from previous prime (1217309) and next prime (1217317).

It can be written as a sum of positive squares in only one way, i.e., 1096209 + 121104 = 1047^2 + 348^2 .

It is not a de Polignac number, because 1217313 - 2² = 1217309 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1217317) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67620 + ... + 67637.

It is an arithmetic number, because the mean of its divisors is an integer number (293059).

2^1217313 is an apocalyptic number.

It is an amenable number.

1217313 is a deficient number, since it is larger than the sum of its proper divisors (541041).

1217313 is a wasteful number, since it uses less digits than its factorization.

1217313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135263 (or 135260 counting only the distinct ones).

The product of its digits is 126, while the sum is 18.

The square root of 1217313 is about 1103.3190834931. The cubic root of 1217313 is about 106.7744689214.

The spelling of 1217313 in words is "one million, two hundred seventeen thousand, three hundred thirteen".