12730100 has 18 divisors (see below), whose sum is σ = 27624534. Its totient is φ = 5092000.

The previous prime is 12730097. The next prime is 12730121. The reversal of 12730100 is 103721.

It can be written as a sum of positive squares in 3 ways, for example, as 633616 + 12096484 = 796^2 + 3478^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 63551 + ... + 63750.

Almost surely, 2^12730100 is an apocalyptic number.

12730100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12730100 is an abundant number, since it is smaller than the sum of its proper divisors (14894434).

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

12730100 is a wasteful number, since it uses less digits than its factorization.

12730100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127315 (or 127308 counting only the distinct ones).

The product of its (nonzero) digits is 42, while the sum is 14.

The square root of 12730100 is about 3567.9265687511. The cubic root of 12730100 is about 233.4948315063.

Adding to 12730100 its reverse (103721), we get a palindrome (12833821).

The spelling of 12730100 in words is "twelve million, seven hundred thirty thousand, one hundred".