12288739 has 16 divisors (see below), whose sum is σ = 13856832. Its totient is φ = 10835968.

The previous prime is 12288737. The next prime is 12288743. The reversal of 12288739 is 93788221.

It is a cyclic number.

It is not a de Polignac number, because 12288739 - 2¹ = 12288737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12288737) 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 15 ways as a sum of consecutive naturals, for example, 20427 + ... + 21019.

It is an arithmetic number, because the mean of its divisors is an integer number (866052).

Almost surely, 2^12288739 is an apocalyptic number.

12288739 is a deficient number, since it is larger than the sum of its proper divisors (1568093).

12288739 is a wasteful number, since it uses less digits than its factorization.

12288739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686.

The product of its digits is 48384, while the sum is 40.

The square root of 12288739 is about 3505.5297745134. The cubic root of 12288739 is about 230.7645571219.

The spelling of 12288739 in words is "twelve million, two hundred eighty-eight thousand, seven hundred thirty-nine".