1393217 has 6 divisors (see below), whose sum is σ = 1620738. Its totient is φ = 1194144.

The previous prime is 1393193. The next prime is 1393219. The reversal of 1393217 is 7123931.

It can be written as a sum of positive squares in only one way, i.e., 1132096 + 261121 = 1064^2 + 511^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1393217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1393219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14168 + ... + 14265.

It is an arithmetic number, because the mean of its divisors is an integer number (270123).

2^1393217 is an apocalyptic number.

It is an amenable number.

1393217 is a deficient number, since it is larger than the sum of its proper divisors (227521).

1393217 is an equidigital number, since it uses as much as digits as its factorization.

1393217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28447 (or 28440 counting only the distinct ones).

The product of its digits is 1134, while the sum is 26.

The square root of 1393217 is about 1180.3461356738. The cubic root of 1393217 is about 111.6879333768.

The spelling of 1393217 in words is "one million, three hundred ninety-three thousand, two hundred seventeen".