12578739 has 8 divisors (see below), whose sum is σ = 16799952. Its totient is φ = 8371680.

The previous prime is 12578737. The next prime is 12578743. The reversal of 12578739 is 93787521.

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

It is not a de Polignac number, because 12578739 - 2¹ = 12578737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12578739.

It is not an unprimeable number, because it can be changed into a prime (12578737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1252 + ... + 5169.

It is an arithmetic number, because the mean of its divisors is an integer number (2099994).

Almost surely, 2^12578739 is an apocalyptic number.

12578739 is a deficient number, since it is larger than the sum of its proper divisors (4221213).

12578739 is an equidigital number, since it uses as much as digits as its factorization.

12578739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7077.

The product of its digits is 105840, while the sum is 42.

The square root of 12578739 is about 3546.6518013473. The cubic root of 12578739 is about 232.5657208128.

The spelling of 12578739 in words is "twelve million, five hundred seventy-eight thousand, seven hundred thirty-nine".