12640250 has 64 divisors (see below), whose sum is σ = 28035072. Its totient is φ = 4176000.

The previous prime is 12640247. The next prime is 12640261. The reversal of 12640250 is 5204621.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54134 + ... + 54366.

It is an arithmetic number, because the mean of its divisors is an integer number (438048).

Almost surely, 2^12640250 is an apocalyptic number.

12640250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12640250 is an abundant number, since it is smaller than the sum of its proper divisors (15394822).

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

12640250 is a wasteful number, since it uses less digits than its factorization.

12640250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 12640250 is about 3555.3129257493. The cubic root of 12640250 is about 232.9441926429.

Adding to 12640250 its reverse (5204621), we get a palindrome (17844871).

The spelling of 12640250 in words is "twelve million, six hundred forty thousand, two hundred fifty".