12851645 has 8 divisors (see below), whose sum is σ = 15564120. Its totient is φ = 10186560.

The previous prime is 12851621. The next prime is 12851659. The reversal of 12851645 is 54615821.

12851645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1162084 + 11689561 = 1078^2 + 3419^2 .

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

It is not a de Polignac number, because 12851645 - 2⁸ = 12851389 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11246 + ... + 12335.

It is an arithmetic number, because the mean of its divisors is an integer number (1945515).

Almost surely, 2^12851645 is an apocalyptic number.

It is an amenable number.

12851645 is a deficient number, since it is larger than the sum of its proper divisors (2712475).

12851645 is a wasteful number, since it uses less digits than its factorization.

12851645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23695.

The product of its digits is 9600, while the sum is 32.

The square root of 12851645 is about 3584.9191064793. The cubic root of 12851645 is about 234.2356029159.

The spelling of 12851645 in words is "twelve million, eight hundred fifty-one thousand, six hundred forty-five".