12618945 has 24 divisors (see below), whose sum is σ = 23025600. Its totient is φ = 6375456.

The previous prime is 12618943. The next prime is 12618967. The reversal of 12618945 is 54981621.

It is not a de Polignac number, because 12618945 - 2¹ = 12618943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12618943) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6525 + ... + 8234.

It is an arithmetic number, because the mean of its divisors is an integer number (959400).

Almost surely, 2^12618945 is an apocalyptic number.

12618945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12618945 is a deficient number, since it is larger than the sum of its proper divisors (10406655).

12618945 is a wasteful number, since it uses less digits than its factorization.

12618945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14789 (or 14786 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 12618945 is about 3552.3154420744. The cubic root of 12618945 is about 232.8132441007.

The spelling of 12618945 in words is "twelve million, six hundred eighteen thousand, nine hundred forty-five".