12409857 has 12 divisors (see below), whose sum is σ = 18705024. Its totient is φ = 7913400.

The previous prime is 12409849. The next prime is 12409879. The reversal of 12409857 is 75890421.

It is not a de Polignac number, because 12409857 - 2³ = 12409849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12409357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29769 + ... + 30182.

It is an arithmetic number, because the mean of its divisors is an integer number (1558752).

Almost surely, 2^12409857 is an apocalyptic number.

It is an amenable number.

12409857 is a deficient number, since it is larger than the sum of its proper divisors (6295167).

12409857 is a wasteful number, since it uses less digits than its factorization.

12409857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59980 (or 59977 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 12409857 is about 3522.7626942501. The cubic root of 12409857 is about 231.5202195968.

The spelling of 12409857 in words is "twelve million, four hundred nine thousand, eight hundred fifty-seven".