12545917 has 8 divisors (see below), whose sum is σ = 13082112. Its totient is φ = 12018000.

The previous prime is 12545903. The next prime is 12545927. The reversal of 12545917 is 71954521.

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 12545917 - 2¹⁹ = 12021629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12545927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1128 + ... + 5134.

It is an arithmetic number, because the mean of its divisors is an integer number (1635264).

Almost surely, 2^12545917 is an apocalyptic number.

It is an amenable number.

12545917 is a deficient number, since it is larger than the sum of its proper divisors (536195).

12545917 is a wasteful number, since it uses less digits than its factorization.

12545917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4139.

The product of its digits is 12600, while the sum is 34.

The square root of 12545917 is about 3542.0215979014. The cubic root of 12545917 is about 232.3632648815.

The spelling of 12545917 in words is "twelve million, five hundred forty-five thousand, nine hundred seventeen".