12750385 has 16 divisors (see below), whose sum is σ = 16106832. Its totient is φ = 9682560.

The previous prime is 12750383. The next prime is 12750389. The reversal of 12750385 is 58305721.

It can be written as a sum of positive squares in 8 ways, for example, as 9941409 + 2808976 = 3153^2 + 1676^2 .

It is not a de Polignac number, because 12750385 - 2¹ = 12750383 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 (12750383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310965 + ... + 311005.

It is an arithmetic number, because the mean of its divisors is an integer number (1006677).

Almost surely, 2^12750385 is an apocalyptic number.

It is an amenable number.

12750385 is a deficient number, since it is larger than the sum of its proper divisors (3356447).

12750385 is an frugal number, since it uses more digits than its factorization.

12750385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 12750385 is about 3570.7681246477. The cubic root of 12750385 is about 233.6187878275.

The spelling of 12750385 in words is "twelve million, seven hundred fifty thousand, three hundred eighty-five".