12409887 has 12 divisors (see below), whose sum is σ = 19248216. Its totient is φ = 7091280.

The previous prime is 12409879. The next prime is 12409909. The reversal of 12409887 is 78890421.

It is not a de Polignac number, because 12409887 - 2³ = 12409879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12409387) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42064 + ... + 42357.

It is an arithmetic number, because the mean of its divisors is an integer number (1604018).

Almost surely, 2^12409887 is an apocalyptic number.

12409887 is a deficient number, since it is larger than the sum of its proper divisors (6838329).

12409887 is an equidigital number, since it uses as much as digits as its factorization.

12409887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84438 (or 84431 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 12409887 is about 3522.7669522692. The cubic root of 12409887 is about 231.5204061582.

The spelling of 12409887 in words is "twelve million, four hundred nine thousand, eight hundred eighty-seven".