1313247 has 16 divisors (see below), whose sum is σ = 1906688. Its totient is φ = 799200.

The previous prime is 1313239. The next prime is 1313293. The reversal of 1313247 is 7423131.

It is not a de Polignac number, because 1313247 - 2³ = 1313239 is a prime.

It is a Smith number, since the sum of its digits (21) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Duffinian number.

1313247 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313237) 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 15 ways as a sum of consecutive naturals, for example, 5778 + ... + 6000.

It is an arithmetic number, because the mean of its divisors is an integer number (119168).

2^1313247 is an apocalyptic number.

1313247 is a deficient number, since it is larger than the sum of its proper divisors (593441).

1313247 is a wasteful number, since it uses less digits than its factorization.

1313247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390.

The product of its digits is 504, while the sum is 21.

The square root of 1313247 is about 1145.9698948925. The cubic root of 1313247 is about 109.5087459914.

Adding to 1313247 its reverse (7423131), we get a palindrome (8736378).

The spelling of 1313247 in words is "one million, three hundred thirteen thousand, two hundred forty-seven".