1313243 has 4 divisors (see below), whose sum is σ = 1321008. Its totient is φ = 1305480.

The previous prime is 1313239. The next prime is 1313293. The reversal of 1313243 is 3423131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1313243 - 2² = 1313239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1313293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3623 + ... + 3968.

It is an arithmetic number, because the mean of its divisors is an integer number (330252).

2^1313243 is an apocalyptic number.

1313243 is a deficient number, since it is larger than the sum of its proper divisors (7765).

1313243 is an equidigital number, since it uses as much as digits as its factorization.

1313243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7764.

The product of its digits is 216, while the sum is 17.

The square root of 1313243 is about 1145.9681496447. The cubic root of 1313243 is about 109.5086348076.

Adding to 1313243 its reverse (3423131), we get a palindrome (4736374).

The spelling of 1313243 in words is "one million, three hundred thirteen thousand, two hundred forty-three".