12578785 has 4 divisors (see below), whose sum is σ = 15094548. Its totient is φ = 10063024.

The previous prime is 12578767. The next prime is 12578801. The reversal of 12578785 is 58787521.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9941409 + 2637376 = 3153^2 + 1624^2 .

It is a cyclic number.

It is not a de Polignac number, because 12578785 - 2¹⁷ = 12447713 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1257874 + ... + 1257883.

It is an arithmetic number, because the mean of its divisors is an integer number (3773637).

Almost surely, 2^12578785 is an apocalyptic number.

It is an amenable number.

12578785 is a deficient number, since it is larger than the sum of its proper divisors (2515763).

12578785 is an equidigital number, since it uses as much as digits as its factorization.

12578785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2515762.

The product of its digits is 156800, while the sum is 43.

The square root of 12578785 is about 3546.6582863310. The cubic root of 12578785 is about 232.5660043073.

The spelling of 12578785 in words is "twelve million, five hundred seventy-eight thousand, seven hundred eighty-five".