1315205 has 8 divisors (see below), whose sum is σ = 1671192. Its totient is φ = 990208.

The previous prime is 1315187. The next prime is 1315211. The reversal of 1315205 is 5025131.

It can be written as a sum of positive squares in 4 ways, for example, as 229441 + 1085764 = 479^2 + 1042^2 .

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 1315205 - 2¹² = 1311109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7652 + ... + 7821.

It is an arithmetic number, because the mean of its divisors is an integer number (208899).

2^1315205 is an apocalyptic number.

It is an amenable number.

1315205 is a deficient number, since it is larger than the sum of its proper divisors (355987).

1315205 is a wasteful number, since it uses less digits than its factorization.

1315205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15495.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 1315205 is about 1146.8238748823. The cubic root of 1315205 is about 109.5631433871.

The spelling of 1315205 in words is "one million, three hundred fifteen thousand, two hundred five".