12897530 has 8 divisors (see below), whose sum is σ = 23215572. Its totient is φ = 5159008.

The previous prime is 12897529. The next prime is 12897541. The reversal of 12897530 is 3579821.

It can be written as a sum of positive squares in 2 ways, for example, as 10686361 + 2211169 = 3269^2 + 1487^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 644867 + ... + 644886.

Almost surely, 2^12897530 is an apocalyptic number.

12897530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12897530 is a deficient number, since it is larger than the sum of its proper divisors (10318042).

12897530 is a wasteful number, since it uses less digits than its factorization.

12897530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289760.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 12897530 is about 3591.3131303188. The cubic root of 12897530 is about 234.5140402848.

The spelling of 12897530 in words is "twelve million, eight hundred ninety-seven thousand, five hundred thirty".