12578906 has 4 divisors (see below), whose sum is σ = 18868362. Its totient is φ = 6289452.

The previous prime is 12578903. The next prime is 12578911. The reversal of 12578906 is 60987521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12567025 + 11881 = 3545^2 + 109^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12578906.

It is not an unprimeable number, because it can be changed into a prime (12578903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3144725 + ... + 3144728.

Almost surely, 2^12578906 is an apocalyptic number.

12578906 is a deficient number, since it is larger than the sum of its proper divisors (6289456).

12578906 is an equidigital number, since it uses as much as digits as its factorization.

12578906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6289455.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 12578906 is about 3546.6753446009. The cubic root of 12578906 is about 232.5667500178.

The spelling of 12578906 in words is "twelve million, five hundred seventy-eight thousand, nine hundred six".