12678530 has 16 divisors (see below), whose sum is σ = 23049144. Its totient is φ = 5020800.

The previous prime is 12678527. The next prime is 12678557. The reversal of 12678530 is 3587621.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12201049 + 477481 = 3493^2 + 691^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5267 + ... + 7286.

Almost surely, 2^12678530 is an apocalyptic number.

12678530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12678530 is a deficient number, since it is larger than the sum of its proper divisors (10370614).

12678530 is a wasteful number, since it uses less digits than its factorization.

12678530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12661.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 12678530 is about 3560.6923484064. The cubic root of 12678530 is about 233.1791066999.

Subtracting from 12678530 its reverse (3587621), we obtain a palindrome (9090909).

The spelling of 12678530 in words is "twelve million, six hundred seventy-eight thousand, five hundred thirty".