12630645 has 12 divisors (see below), whose sum is σ = 21893196. Its totient is φ = 6736320.

The previous prime is 12630641. The next prime is 12630647. The reversal of 12630645 is 54603621.

12630645 is a `hidden beast` number, since 12 + 6 + 3 + 0 + 645 = 666.

12630645 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1461681 + 11168964 = 1209^2 + 3342^2 .

It is not a de Polignac number, because 12630645 - 2² = 12630641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12630641) 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, 140296 + ... + 140385.

It is an arithmetic number, because the mean of its divisors is an integer number (1824433).

Almost surely, 2^12630645 is an apocalyptic number.

12630645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12630645 is a deficient number, since it is larger than the sum of its proper divisors (9262551).

12630645 is a wasteful number, since it uses less digits than its factorization.

12630645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280692 (or 280689 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 12630645 is about 3553.9618737403. The cubic root of 12630645 is about 232.8851749301.

The spelling of 12630645 in words is "twelve million, six hundred thirty thousand, six hundred forty-five".