12540313 has 4 divisors (see below), whose sum is σ = 13085568. Its totient is φ = 11995060.

The previous prime is 12540263. The next prime is 12540317. The reversal of 12540313 is 31304521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31304521 = 3109 ⋅10069.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12540313 is a prime.

It is a super-3 number, since 3×12540313³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12540317) 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, 272593 + ... + 272638.

It is an arithmetic number, because the mean of its divisors is an integer number (3271392).

Almost surely, 2^12540313 is an apocalyptic number.

It is an amenable number.

12540313 is a deficient number, since it is larger than the sum of its proper divisors (545255).

12540313 is an equidigital number, since it uses as much as digits as its factorization.

12540313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545254.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 12540313 is about 3541.2304358796. The cubic root of 12540313 is about 232.3286624509.

Adding to 12540313 its reverse (31304521), we get a palindrome (43844834).

The spelling of 12540313 in words is "twelve million, five hundred forty thousand, three hundred thirteen".