12279705 has 24 divisors (see below), whose sum is σ = 20179776. Its totient is φ = 6376320.

The previous prime is 12279703. The next prime is 12279779. The reversal of 12279705 is 50797221.

It is not a de Polignac number, because 12279705 - 2¹ = 12279703 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12279703) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24972 + ... + 25458.

It is an arithmetic number, because the mean of its divisors is an integer number (840824).

Almost surely, 2^12279705 is an apocalyptic number.

12279705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12279705 is a deficient number, since it is larger than the sum of its proper divisors (7900071).

12279705 is an equidigital number, since it uses as much as digits as its factorization.

12279705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577 (or 536 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 33.

The square root of 12279705 is about 3504.2410019860. The cubic root of 12279705 is about 230.7079948205.

The spelling of 12279705 in words is "twelve million, two hundred seventy-nine thousand, seven hundred five".