12749279 has 4 divisors (see below), whose sum is σ = 12758160. Its totient is φ = 12740400.

The previous prime is 12749273. The next prime is 12749293. The reversal of 12749279 is 97294721.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12749279 - 2⁴ = 12749263 is a prime.

It is a super-3 number, since 3×12749279³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12749273) 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, 1739 + ... + 5340.

It is an arithmetic number, because the mean of its divisors is an integer number (3189540).

Almost surely, 2^12749279 is an apocalyptic number.

12749279 is a deficient number, since it is larger than the sum of its proper divisors (8881).

12749279 is an equidigital number, since it uses as much as digits as its factorization.

12749279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8880.

The product of its digits is 63504, while the sum is 41.

The square root of 12749279 is about 3570.6132526500. The cubic root of 12749279 is about 233.6120327413.

The spelling of 12749279 in words is "twelve million, seven hundred forty-nine thousand, two hundred seventy-nine".