1240313 has 4 divisors (see below), whose sum is σ = 1260708. Its totient is φ = 1219920.

The previous prime is 1240307. The next prime is 1240319. The reversal of 1240313 is 3130421.

1240313 = 787² + 788².

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

It is an interprime number because it is at equal distance from previous prime (1240307) and next prime (1240319).

It can be written as a sum of positive squares in 2 ways, for example, as 619369 + 620944 = 787^2 + 788^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1240313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10106 + ... + 10227.

It is an arithmetic number, because the mean of its divisors is an integer number (315177).

2^1240313 is an apocalyptic number.

1240313 is the 788-th centered square number.

It is an amenable number.

1240313 is a deficient number, since it is larger than the sum of its proper divisors (20395).

1240313 is an equidigital number, since it uses as much as digits as its factorization.

1240313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20394.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1240313 is about 1113.6934048471. The cubic root of 1240313 is about 107.4427457874.

Adding to 1240313 its reverse (3130421), we get a palindrome (4370734).

The spelling of 1240313 in words is "one million, two hundred forty thousand, three hundred thirteen".