12889247 has 16 divisors (see below), whose sum is σ = 15785280. Its totient is φ = 10272768.

The previous prime is 12889243. The next prime is 12889249. The reversal of 12889247 is 74298821.

It is a cyclic number.

It is not a de Polignac number, because 12889247 - 2² = 12889243 is a prime.

It is a super-2 number, since 2×12889247² = 332265376454018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12889243) 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, 9983 + ... + 11199.

It is an arithmetic number, because the mean of its divisors is an integer number (986580).

Almost surely, 2^12889247 is an apocalyptic number.

12889247 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

12889247 is a deficient number, since it is larger than the sum of its proper divisors (2896033).

12889247 is a wasteful number, since it uses less digits than its factorization.

12889247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330.

The product of its digits is 64512, while the sum is 41.

The square root of 12889247 is about 3590.1597457495. The cubic root of 12889247 is about 234.4638266451.

The spelling of 12889247 in words is "twelve million, eight hundred eighty-nine thousand, two hundred forty-seven".