12561250 has 40 divisors (see below), whose sum is σ = 25388748. Its totient is φ = 4632000.

The previous prime is 12561233. The next prime is 12561257. The reversal of 12561250 is 5216521.

It can be written as a sum of positive squares in 10 ways, for example, as 5764801 + 6796449 = 2401^2 + 2607^2 .

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (12561257) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15864 + ... + 16636.

Almost surely, 2^12561250 is an apocalyptic number.

12561250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12561250 is an abundant number, since it is smaller than the sum of its proper divisors (12827498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12561250 is an equidigital number, since it uses as much as digits as its factorization.

12561250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808 (or 793 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 12561250 is about 3544.1853788988. The cubic root of 12561250 is about 232.4578873123.

Adding to 12561250 its reverse (5216521), we get a palindrome (17777771).

The spelling of 12561250 in words is "twelve million, five hundred sixty-one thousand, two hundred fifty".