12985409 has 8 divisors (see below), whose sum is σ = 13917120. Its totient is φ = 12084336.

The previous prime is 12985393. The next prime is 12985421. The reversal of 12985409 is 90458921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12985409 - 2⁴ = 12985393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12985429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6779 + ... + 8480.

It is an arithmetic number, because the mean of its divisors is an integer number (1739640).

Almost surely, 2^12985409 is an apocalyptic number.

It is an amenable number.

12985409 is a deficient number, since it is larger than the sum of its proper divisors (931711).

12985409 is a wasteful number, since it uses less digits than its factorization.

12985409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15319.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 12985409 is about 3603.5272997440. The cubic root of 12985409 is about 235.0454657768.

The spelling of 12985409 in words is "twelve million, nine hundred eighty-five thousand, four hundred nine".