1317245 has 8 divisors (see below), whose sum is σ = 1673784. Its totient is φ = 991744.

The previous prime is 1317229. The next prime is 1317247. The reversal of 1317245 is 5427131.

It can be written as a sum of positive squares in 4 ways, for example, as 643204 + 674041 = 802^2 + 821^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1317245 - 2⁴ = 1317229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1317245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7664 + ... + 7833.

It is an arithmetic number, because the mean of its divisors is an integer number (209223).

2^1317245 is an apocalyptic number.

It is an amenable number.

1317245 is a deficient number, since it is larger than the sum of its proper divisors (356539).

1317245 is a wasteful number, since it uses less digits than its factorization.

1317245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15519.

The product of its digits is 840, while the sum is 23.

The square root of 1317245 is about 1147.7129432049. The cubic root of 1317245 is about 109.6197615192.

The spelling of 1317245 in words is "one million, three hundred seventeen thousand, two hundred forty-five".