12578530 has 8 divisors (see below), whose sum is σ = 22641372. Its totient is φ = 5031408.

The previous prime is 12578507. The next prime is 12578549. The reversal of 12578530 is 3587521.

It can be written as a sum of positive squares in 2 ways, for example, as 10426441 + 2152089 = 3229^2 + 1467^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 12578492 and 12578501.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 628917 + ... + 628936.

Almost surely, 2^12578530 is an apocalyptic number.

12578530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12578530 is a deficient number, since it is larger than the sum of its proper divisors (10062842).

12578530 is a wasteful number, since it uses less digits than its factorization.

12578530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257860.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 12578530 is about 3546.6223368157. The cubic root of 12578530 is about 232.5644327530.

The spelling of 12578530 in words is "twelve million, five hundred seventy-eight thousand, five hundred thirty".