12743915 has 4 divisors (see below), whose sum is σ = 15292704. Its totient is φ = 10195128.

The previous prime is 12743911. The next prime is 12743917. The reversal of 12743915 is 51934721.

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 12743915 - 2² = 12743911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12743911) 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, 1274387 + ... + 1274396.

It is an arithmetic number, because the mean of its divisors is an integer number (3823176).

Almost surely, 2^12743915 is an apocalyptic number.

12743915 is a deficient number, since it is larger than the sum of its proper divisors (2548789).

12743915 is an equidigital number, since it uses as much as digits as its factorization.

12743915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2548788.

The product of its digits is 7560, while the sum is 32.

The square root of 12743915 is about 3569.8620421523. The cubic root of 12743915 is about 233.5792656407.

The spelling of 12743915 in words is "twelve million, seven hundred forty-three thousand, nine hundred fifteen".